Day and night are caused by the Earth’s . A.
biosphere
B.
rotation
C.
revolution
D.
atmosphere

Please select the best answer from the choices provided
A
B
C
D

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