The idea of trading in the old empires (Ghana, Mali, and Songhai) was new. How did trade help create these civilizations? PLZ help worth 50 POINTS giving brainliest :)

the gold-salt trade in Africa made Ghana a powerful empire because they controlled the trade routes and taxed traders. Control of gold-salt trade routes helped Ghana, Mali, and Songhai to become large and powerful West African kingdoms.

Explanation:

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when world war i broke out across europe in 1914, president woodrow wilson proclaimed the united states would remain neutral, and many americans supported this policy of nonintervention. however, public opinion about neutrality started to change after the sinking of the british ocean liner lusitania by a german u-boat in 1915; almost 2,000 people perished, including 128 americans. along with news of the zimmerman telegram threatening an alliance between germany and mexico, wilson asked congress for a declaration of war against germany. the u.s. officially entered the conflict on april 6, 1917.