C. What are the exter d. How do the internal factors like earthquakes and volcanoes change in earth's crust? Mention.

C . Exeter Friendly Society (which since 2015 has traded as The Exeter) is a British friendly society offering a range of insurance products including Income Protection Insurance, Private Medical Insurance, CrashPlan's and Life Insurance.

D . A volcano is an opening in Earth's crust that allows molten rock from beneath the crust to reach the surface. … Along with lava, volcanoes also release gases, ash, and rock. It's a super hot mix that can be both incredibly destructive and creative. Volcanoes form at the edges of Earth's tectonic plates.

This non-stop movement causes stress on Earth's crust. When the stresses get too large, it leads to cracks called faults. When tectonic plates move, it also causes movements at the faults. An earthquake is the sudden movement of Earth's crust at a fault line.

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