Final answer:
The Nile River was crucial for the Egyptian Civilization, the East African geography supported the Swahili culture, and the Niger River was vital for West African Civilizations.
Step-by-step explanation:
The geographical features of Africa have played a significant role in the development of various civilizations and cultures on the continent. For example, the Nile River supported the development of the Egyptian Civilization by providing a source of irrigation for agriculture, which enabled the civilization to produce excess food and sustain a structured, urban society. Similarly, East Africa is where the Swahili culture emerged, taking advantage of the coastal environment and trade routes in the Indian Ocean. The Niger River fostered the growth of West African Civilizations by serving as a trade and transportation network, thus aiding the development of rich and powerful empires.