The tribes of central and southern africa are based on which customs

The tribes of central and southern Africa is based on Africa's Customs

Water, air an land are sacred t them and worship there spirit.

Explanation:

The tribes of central and southern Africa are Zulu,  Xhosa, Ndebele, Sotho and that of central Africa are Aka, Baka, Chewa, Kanuri. All practice the customs of the worship and praise the nature of the mountains and the lakes and the forests. Like the Venda south Africa trobe that originated in the great lake and has a mix of other cultures of the Sotho and Nguni, they tend to practice the male circumcision and forbid the consumption of pork, worship in there family ancestor and practice polygamy.

No it is an oblate spheroid apparently