Question

what are plains and how are they formed? why is word's maximum population concentrated in plains?
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Answer 1

Answer:

Plains form in many different ways. Some plains form as ice and water erodes, or wears away, the dirt and rock on higher land. Water and ice carry the bits of dirt, rock, and other material, called sediment, down hillsides to be deposited elsewhere. As layer upon layer of this sediment is laid down, plains form.

Explanation:

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