Since the sun heats up more air at the equator than it does at the poles choose 1
1.it sets in motion massive circulations of air
2.warm, moist air at the equator rises and flows towards the poles
3.cool, polar air sinks and flows back towards the equator
4.all of the above
please help will mark brainliest if right

1. you serve a volleyball with a mass of 2.1 kg. the ball leaves your hand with a speed of 30 m/s. the ball has energy. calculate it. 2. a baby carriage is sitting at the top of a hill that is 21 m high. the carriage with the baby weighs 12 n. the carriage has energy. calculate it. 3. a car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. the car has . calculate it.