The picture above illustrates what scientific principle? 单项选择题

The equator is hotter than the pole because the equator is closer to the sun than the pole

The equator is hotter than the pole because the sun hits the equator directly but the sun hits the pole at a glancing blow

The equator is hotter because it rotates faster, and the wind heats the surface as it rotates by, just as Dr. Alley can turn his head rapidly and cause heat by friction

The equator is hotter than the poles because most volcanoes are located near the equator, forced there by the centrifugal force of Earth’s rotation, and Dr. Alley exhales hot air from his equatorial nose