All lines of longitude are circles true or false​

What are seismic dampers and why are they important?

What term is given to the border between the central alps and the southern limestone alps?

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