Information: - Peru , officially the Republic of Peru, is a country in western South America. It is bordered in the north by Ecuador and Colombia, in the east by Brazil, in the southeast by Bolivia, in the south by Chile, and in the west by the Pacific Ocean. Peru is an extremely biodiverse country with habitats ranging from the arid plains of the Pacific coastal region in the west to the peaks of the Andes mountains vertically extending from the north to the southeast of the country to the tropical Amazon Basin rainforest in the east with the Amazon river. - An invasive species is a plant, fungus, or animal species that is not native to a specific location (an introduced species), and which has a tendency to spread to a degree believed to cause damage to the environment, human economy or human health. - A legume (or ) is a plant or its fruit or seed in the family Fabaceae (or Leguminosae). Legumes are grown agriculturally, primarily for their grain seed called pulse, for livestock forage and silage, and as soil-enhancing green manure. Well-known legumes include alfalfa, clover, peas, beans, lentils, lupin bean, mesquite, carob, soybeans, peanuts and tamarind. "Fabaceae" is the most common family found in tropical rainforests and in dry forests in the Americas and Africa. - Brazil, officially the Federative Republic of Brazil, is the largest country in both South America and Latin America. As the world's fifth-largest country by both area and population, it is the largest country to have Portuguese as an official language and the only one in the Americas. Bounded by the Atlantic Ocean on the east, Brazil has a coastline of . It borders all other South American countries except Ecuador and Chile and covers 47.3% of the continent's land area. Its Amazon River basin includes a vast tropical forest, home to diverse wildlife, a variety of ecological systems, and extensive natural resources spanning numerous protected habitats. This unique environmental heritage makes Brazil one of 17 megadiverse countries, and is the subject of significant global interest and debate regarding deforestation and environmental protection. - Mesquite is the common name for the genus "Prosopis" and there are over 40 species of small leguminous trees. They are native to the southwestern United States and Mexico (except for creeping mesquite, which is invasive in southern California). The mesquite originates from the Tamaulipan mezquital ecoregion, in the deserts and xeric shrublands biome, located in the southern United States and northeastern Mexico. It covers an area of 141,500km (54,600 sq mi), encompassing a portion of the Gulf Coastal Plain in southern Texas, northern Tamaulipas, northeastern Coahuila, and part of Nuevo Leon. As a legume, it is one of the few sources of fixed nitrogen in the desert habitat. - Vachellia aroma var. huarango is low shrub or small tree which grows less than 1.5 m tall , but up to 5 m across . It is found in Ecuador and Peru . This species should not be confused with the Huarango tree Prosopis pallida which is also native to Peru . - The Galapagos Islands (official name: "Archipielago de Colon", other Spanish name: "Islas Galapagos") are an archipelago of volcanic islands distributed on either side of the Equator in the Pacific Ocean surrounding the centre of the Western Hemisphere, west of continental Ecuador, of which they are a part. The islands are known for their vast number of endemic species and were studied by Charles Darwin during the voyage of the "Beagle", as his observations and collections contributed to the inception of Darwin's theory of evolution by natural selection. - Prosopis alba is a South American tree species that grows in central Argentina, the Gran Chaco ecoregion, and part of the Argentine Mesopotamia, as well as Bolivia, Paraguay, and Peru. It is known as algarrobo blanco in Spanish, which means "white carob tree". Spanish settlers gave it that name because of its similarity to the European carob tree ("Ceratonia siliqua"). Other common names come from Guarani, including ibope and igope. - In botany, a tree is a perennial plant with an elongated stem, or trunk, supporting branches and leaves in most species. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are usable as lumber or plants above a specified height. Trees are not a taxonomic group but include a variety of plant species that have independently evolved a woody trunk and branches as a way to tower above other plants to compete for sunlight. In looser senses, the taller palms, the tree ferns, bananas and bamboos are also trees. Trees tend to be long-lived, some reaching several thousand years old. The tallest known tree, a coast redwood named Hyperion, stands high. Trees have been in existence for 370 million years. It is estimated that there are just over 3 trillion mature trees in the world. - Prosopis pallida is a species of mesquite tree. It has the common names kiawe, huarango and American carob, as well as "bayahonda" (a generic term for "Prosopis") and "algarrobo blanco" (usually used for "Prosopis alba"). It is a thorny legume, native to Colombia, Ecuador and Peru, particularly drier areas near the coast. While threatened in its native habitat, it is considered an invasive species in many other places. - The Amazon River (or ; Spanish and ) in South America is the largest river by discharge of water in the world, and according to some experts, the longest in length. The headwaters of the Apurimac River on Nevado Mismi had been considered for nearly a century as the Amazons most distant source, until a 2014 study found it to be the Cordillera Rumi Cruz at the headwaters of the Mantaro River in Peru. The Mantaro and Apurimac confluence, and with other tributaries form the Ucayali River, which in turn confluences with the Maranon River upstream of Iquitos, Peru, to form what countries other than Brazil consider to be the main stem of the Amazon. Brazilians call this section the Solimoes River above its confluence with the Rio Negro to form what Brazilians call the Amazon at the Meeting of Waters at Manaus, the river's largest city. - Ecuador, officially the Republic of Ecuador (which literally translates as "Republic of the Equator"), is a representative democratic republic in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean to the west. Ecuador also includes the Galapagos Islands in the Pacific, about west of the mainland. 'vachellia aroma var. huarango' is related to which object entity through the relation of 'taxon rank'? Choices: - family - form - genus - group - species - variety
Answer:
variety