After a shield volcano erupts, it usually is a) a little higher because most of the lava runs down the sides of the volcano. b) a lot higher because most of the lava piles up around the vent. c) lower because the top of the volcano will cave in.

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