Why are earths tectonic plates continually moving?

The large connected urbane area from boston to washington, d. c. is often referred to as

What can happen to solar radiation when it enters earths atmosphere? check all that apply 1)it is absorbed by earth. 2)it is reflected by clouds. 3)it is reflected by glacial ice. 4)it is condensed into visible light. 5) is amplified by water molecules.

Which of the following areas has the highest population density?