Information: - Java (Indonesian: Jawa; Javanese: ; Sundanese: ) is an island of Indonesia. With a population of over 141 million (the island itself) or 145 million (the administrative region) Census released in December 2015, Java is home to 56.7 percent of the Indonesian population and is the most populous island on Earth. The Indonesian capital city, Jakarta, is located on western Java. Much of Indonesian history took place on Java. It was the center of powerful Hindu-Buddhist empires, the Islamic sultanates, and the core of the colonial Dutch East Indies. Java was also the center of the Indonesian struggle for independence during the 1930s and 1940s. Java dominates Indonesia politically, economically and culturally. - Gamelan is the traditional ensemble music of Java and Bali in Indonesia, made up predominantly of percussive instruments. The most common instruments used are metallophones played by mallets and a set of hand-played drums called "kendhang" which register the beat. Other instruments include xylophones, bamboo flutes, a bowed instrument called a "rebab", and even vocalists called "sindhen". - A metal (from Greek "metallon", "mine, quarry, metal") is a material (an element, compound, or alloy) that is typically hard, opaque, shiny, and has good electrical and thermal conductivity. Metals are generally malleable that is, they can be hammered or pressed permanently out of shape without breaking or cracking as well as fusible (able to be fused or melted) and ductile (able to be drawn out into a thin wire). About 91 of the 118 elements in the periodic table are metals, the others are nonmetals or metalloids. Some elements appear in both metallic and non-metallic forms. - The slenthem ( also slentem or gender panembung ) is a Javanese metallophone which makes up part of a gamelan orchestra . The slenthem is part of the gender family . It consists of a set of bronze keys comprising a single octave : there are six keys when playing the slendro scale and seven when playing the pelog . These keys are suspended by leather cords over individual bamboo tube resonators in a wooden frame , which are cut so that the placement of the bamboo 's node causes the functional length of the resonator to be shorter for higher notes . The instrument is played by striking the keys with a mallet , called a tabuh , which has a short handle and a thin wooden disk edged in cloth or rubber . One hand is left free to dampen notes . It is a low - pitched instrument with a softer sound than the saron demung . Like the saron barung and demung , it generally plays the most basic form of the melody ( balungan ) in a composition . However it also sometimes uses techniques similar to the saron to elaborate . It is especially favored in quieter gamelan ensembles ( such as Gamelan Gadhon ) ; but it is a part of standard Gamelan Gedhe as the only soft - style instrument also played in loud - style pieces . It is typically placed among the instruments at the front of the performing area . - Indonesia (or ; Indonesian: ), officially the Republic of Indonesia, is a unitary sovereign state and transcontinental country located mainly in Southeast Asia with some territories in Oceania. Situated between the Indian and Pacific oceans, it is the world's largest island country, with more than seventeen thousand islands. At , Indonesia is the world's 14th-largest country in terms of land area and world's 7th-largest country in terms of combined sea and land area. It has an estimated population of over 260 million people and is the world's fourth most populous country, the most populous Austronesian nation, as well as the most populous Muslim-majority country. The world's most populous island of Java contains more than half of the country's population. - Bali (Balinese: ) is an island and province of Indonesia. The province includes the island of Bali and a few smaller neighbouring islands, notably Nusa Penida, Nusa Lembongan, and Nusa Ceningan. It is located at the westernmost end of the Lesser Sunda Islands, between Java to the west and Lombok to the east. Its capital, Denpasar, is located in the southern part of the island. - The xylophone (from the Greek words "xylon", "wood" + "phn", "sound, voice", meaning "wooden sound") is a musical instrument in the percussion family that consists of wooden bars struck by mallets. Each bar is an idiophone tuned to a pitch of a musical scale, whether pentatonic or heptatonic in the case of many African and Asian instruments, diatonic in many western children's instruments, or chromatic for orchestral use. - A metallophone is any musical instrument consisting of tuned metal bars which are struck to make sound, usually with a mallet. - The rebab ("rabb", variously spelled "rebap", "rabab", "rebeb", "rababa" and "rabeba", also known as jawza or "joza" in Iraq) is a type of a bowed string instrument so named no later than the 8th century and spread via Islamic trading routes over much of North Africa, the Middle East, parts of Europe, and the Far East. The bowed variety often has a spike at the bottom to rest on the ground (see first image to the right), and is thus called a spike fiddle in certain areas, but plucked versions like the "kabuli rebab" (sometimes referred to as the "robab" or "rubab") also exist. After reading the paragraphs above, we are interested in knowing the entity with which 'slenthem' exhibits the relationship of 'subclass of'. Find the answer from the choices below. Choices: - administrative region - alloy - area - beat - bowed string instrument - capital - case - city - country - element - family - fiddle - greek - home - image - island - javanese - metal - metallophone - mine - music - musical instrument - nation - out - pitch - population - province - republic - scale - sea - sound - spike - spread - string instrument - table - type - western - wood - xylophone
A:
musical instrument