The Earth's Crust is like the skin of an apple. It is very thin in comparison to the other three layers. The crust is only about 3-5 miles (8 kilometers) thick under the oceans( oceanic crust ) and about 25 miles (32 kilometers) thick under the continents ( continental crust)
* got from Google*
The answer is observations
B) A long time increase in the Earths Average temperature
Answer:
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