Explain state how a deep current form?

Deep currents form due to a number of factors, including diurnal effects and heat/cooling cycles. The oceans are in constant motion, with multiple factors, including wind/wave action acting on the upper 100 meters the most.

the answer is:

c. islam and christianity

explanation:

islam and christianity are widely practiced in africa. islam is practiced due to its spread from the middle east into africa, and christianity is practiced due to the colonization of africa by the british empire.