Q:Information: - North America is a continent entirely within the Northern Hemisphere and almost all within the Western Hemisphere. It can also be considered a northern subcontinent of the Americas. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the west and south by the Pacific Ocean, and to the southeast by South America and the Caribbean Sea. - The peach ("Prunus persica") is a deciduous tree native to the region of Northwest China between the Tarim Basin and the north slopes of the Kunlun Shan mountains, where it was first domesticated and cultivated. It bears an edible juicy fruit called a peach or a nectarine. - Glycine max, commonly known as soybean in North America or soya bean, is a species of legume native to East Asia, widely grown for its edible bean which has numerous uses. The plant, classed as an oilseed rather than a pulse by the UN Food and Agriculture Organization, produces significantly more protein per acre than most other uses of land. - Citrus is a genus of flowering trees and shrubs in the rue family, Rutaceae. Plants in the genus produce citrus fruits, including important crops like oranges, lemons, grapefruit, pomelo and limes. - Diaporthe phaseolorum is a plant pathogen with five subspecies : - Diaporthales is an order of sac fungi. Diaporthales includes a number of plant pathogenic fungi, the most notorious of which is "Cryphonectria parasitica" (Murrill) Barr, the chestnut blight fungus that altered the landscape of eastern North America. Other diseases caused by members of this order include stem canker of soybeans ("Diaporthe phaseolorum" (Cooke & Ellis) Sacc. and its varieties), stem-end rot of citrus fruits ("Diaporthe citri" F.A. Wolf), and peach canker disease ("Phomopsis amygdali" Del.). - The Gnomoniaceae are a family of fungi in the Diaporthales order . The family was first described by German botanist Heinrich Georg Winter in 1886 . - The pathogenic fungus Cryphonectria parasitica (formerly "Endothia parasitica") is a member of the Ascomycota (sac fungi) taxon, and is the main cause of chestnut blighta devastating disease of the American chestnut tree that in the early 1900s caused a rapid, widespread die-off of this once plentiful tree from its historic range in the eastern United States. After reading the paragraphs above, we are interested in knowing the entity with which 'gnomoniaceae' exhibits the relationship of 'instance of'. Find the answer from the choices below. Choices: - agriculture - citrus - continent - disease - family - food - fruit - landscape - member - number - ocean - order - organization - pathogenic fungus - plant - protein - prunus - range - region - species - taxon - tree
A:
taxon