What is the weaker, hotter zone beneath the lithosphere that allows motion of earths rigid outer shell

What are advantages and disadvantages of taking troops out of siria?

How many time zone are there on earth

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory