The music of Nigeria includes many kinds of folk and popular music, styles of folk music are related to the multitudes of ethnic groups in the country, each with their own techniques, instruments, and songs. Little is known about the country's music history prior to European contact, although bronze carvings dating back to the 16th and 17th centuries have been found depicting musicians and their instruments. The country's most internationally renowned genres are Indigenous, Apala, Ogene, Fuji, Jùjú, Afrobeat, Afrobeats, Igbo Highlife, Afro-juju, Waka, Igbo rap, Gospel, Yo-pop. Although Nigeria have over 250 ethnic groups but the largest ethnic groups are the Igbo, Hausa and Yoruba. Traditional music from Nigeria and throughout Africa is almost always functional; in other words, it is performed to mark a ritual such as the wedding or funeral and not to achieve artistic goals. Although some Nigerians, especially children and the elderly, play instruments for their own amusement, solo performance is otherwise rare. Music is closely linked to agriculture, and there are restrictions on, for example, which instruments can be played during different parts of the planting season. Work songs are a common type of traditional Nigerian music. They help to keep the rhythm of workers in fields, river canoes and other fields. Women use complex rhythms in housekeeping tasks, such as pounding yams to highly ornamented music. In the northern regions, farmers work together on each other's farms and the host is expected to supply musicians for his neighbours., The issue of musical composition is also highly variable. The Hwana, for example, believe that all songs are taught by the peoples' ancestors, while the Tiv give credit to named composers for almost all songs, and the Efik name individual composers only for secular songs. In many parts of Nigeria, musicians are allowed to say things in their lyrics that would otherwise be perceived as offensive. The most common format for music in Nigeria is the call-and-response choir, in which a lead singer and a chorus interchange verses, sometimes accompanied by instruments that either shadow the lead text or repeat and ostinato vocal phrase. The southern area features complex rhythms and solo players using melody instruments, while the north more typically features polyphonic wind ensembles. The extreme north region is associated with monodic (i.e., single-line) music with an emphasis on drums, and tends to be more influenced by Islamic music. Traditional music Hausa The people