It nearly doubled the land mass of the United States.
Because things will happen over time and those things can change people
Answer:
c observations of many species and their geographical locations.
Explanation:
Darwin's theory of evolution by natural selection explains adaptation and speciation where the best-adapted organisms are more likely to survive. <em>This theory was inspired by the observations made by Thomas Robert Malthus that noticed that the limitations of resources leads to survivance with the formation of new species s a consequence.</em>
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A road or path that crosses a mountain range is called a mountain pass.
Pulling a thing over a surface
