To paint, these early artists used charcoal and ocher (a kind of pigmented, earthen material, that is soft and can be mixed with liquids, and comes in a range of colors like brown, red, yellow, and white).
Of course, we've no way to know for certain why Stone Age people made cave paintings. Fortunately, there are plenty of experts who have theories about the reason why (
Africa’s rock art is as diverse as the continent itself. The African rock art image project team has catalogued c. 23,000 digital photographs of rock art from across Africa