Concept:Hydro-electric power potential depends on abundant water supply and suitable terrain for waterfalls or fast-flowing rivers.
Explanation:Africa is not the world leader because it is surrounded by oceans; ocean water is salty and not used for hydro-electric generation.
The true reason is that Africa receives copious rainfall across many regions, especially around the equator.
It also has many waterfalls, rapids, and highland river systems that provide natural sites for damming and power generation.
These physical conditions give Africa the largest potential reserve of hydro-electric power in the world, even though only a small part of that potential has been developed.
Answer:C. it has copious rainfall and many water falls.