(D) without them animals in marine ecosystems would become over populated
<span>Harriet Tubman
She was not educated and to help her understand the common problems of slaves that she was indirectly advocating for, she had to work where they are mostly employed. With her side businesses of a laundry person and the money she got as payment for her spy service she recruited other people to aid her spy work , useful information she gave helped free alot of slaves</span>
<span>Russian Revolution was comprised of two smaller revolutions, the first of which led to the overthrowing of Nicholas II, the last Russian czar, and the second of which was led by Vladimir Lenin and the Bolsheviks. The Bolsheviks were a radical group of far-left revolutionaries who wished to instill Marxism in Russia.
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Islam entered the African continent from North African countries such as Morocco and Egypt, and was one of the first regions to be conquered by the early Arab-Islamic expansion (7th and 8th centuries). From the tenth to the sixteenth centuries, Muslim traders contributed to the emergence of important kingdoms in West Africa, which flourished thanks to the caravan trade that traversed the Sahara across the Mediterranean world alongside the mountains and savannas of Western Sudan and Central West Africa.
However, a spread of Islam on the African continent gave much more trade and allowed military impositions.