Discuss three reasons why south africa must include renewable energy in its energy mix

Well, Africa is a continent that is very rich in terms of resources, and is readily developing as a nation. One reason would that solar energy would be one of the main sources because of its open land, second, the available waters fr hydroelectric and wind. And lastly, the nation is still coming of age, where many ideas could still be implemented in the region such as renewable energy. 

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Cause of he different elevations  hope this ?

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).