Social Darwinism was the idea in which Europeans thought they were racially superior to other races. This encourage them to treat native Africans poorly as if they were second class. It also prompted their imperialism in the scramble for Africa.
E. growing and urbanizing populations needed to be fed
Answer:
From bottom to top - tropospher -> ozone layer -> stratosphere -> mesosphere -> thermosphere -> exoshpere
Explanation:
The Rift Valley was formed by violent subterranean forces that tore apart the earth's crust.