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The contribution to the study of biology that Charles Darwin is known for is Evolution, In biology evolution is the change in characteristic of a species over several generations and relies on the process of natural selection.
They settled in river valleys because they wanted their crops and soil to be rich and eaiser to water their plants.
Answer: question 1 President Abraham Lincoln issued the Emancipation Proclamation on January 1, 1863, as the nation approached its third year of bloody civil war. The proclamation declared "that all persons held as slaves" within the rebellious states "are, and henceforward shall be free."
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Answer:
D) values
Explanation:
values are the key practices, relationships, and organizations in a society.
