How are convection currents produced in the air?

Question

A
Cold air is less dense, so it rises. As the cold air rises, warm air descends.
B
Wind causes convection currents by stirring up the air.
C
Warm air is less dense, so it rises. Cold air moves in to take its place.
D
Big weather events like hurricanes and tornadoes cause convection currents.

Answer 1

The correct answer is C: Warm air is less dense, so it rises. Cold air moves in to take its place.

Convection currents in the air are produced by the heating of air, which causes the warm air to become less dense and rise. As the warm air rises, it is replaced by cooler, denser air moving in to take its place, creating a continuous cycle of movement.