Answer:
Geomorphology, as a critical component of physical geography, is needed to understand natural landform changes and potential hazards for populations.
Explanation:
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The Earth's rocky outer crust solidified billions of
years ago, soon after the Earth formed. This crust is not a solid
shell; it is broken up into huge, thick plates that drift atop the soft,
underlying mantle.
The plates are made of rock and drift all over the globe; they move both
horizontally (sideways) and vertically (up and down). Over long
periods of time, the plates also change in size as their margins are
added to, crushed together, or pushed back into the Earth's mantle. These plates are from 50 to 250 miles (80 to 400 km) thick.
Answer: A. Pressure from sediment turned decaying plankton at the bottom of the ocean into natural gas.
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