Which event is part of a convince part of a current in the air

A. warm air sinks

B. cool air rises

C. warm air swirls

D. cool air sinks

D

Explanation:

Cool air sinks because it's denser and warm rises because it's less dense.

This is the principle you have in your air conditioning.

As the air is cooled it keeps falling that's why it's necessary to tilt the vents of of an AC at 45° so that the cold air would be well circulated.

The answer is B for sure!