Where does most of the world's population tend to settle?

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

The action of eventually a low island to form. a. wind b. waves c. volcanoes d. tectonic plates

What does the plate tectonic theroy describe?