Answer: The American Civil War was the first war of the modern age. The two sides used advances in communications and military technology to revolutionize the ways in which battles were fought. ... The arrival of railroads and telegraphs also changed the nature of battle.
Mansa Mūsā left a realm notable for its extent and riches—he built the Great Mosque at Timbuktu—but he is best remembered in the Middle East and Europe for the splendour of his pilgrimage to Mecca (1324).
His the answer is “Ganges”
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The answer to the item that you posted is letter A. The Olduvai Gorge in Tanzania is the site of many findings of the earliest humans. It is also one of the important sites to which many had learning and understanding about the human evolution.