Question

where does wind come from? air is made up of molecules. when air is cool, these molecules are dense, or packed tightly together. when air is warm, the molecules become less dense. because of this, warm air rises, leaving behind empty space with low pressure. cool, dense air rushes in to fill that space. the air rushing in is wind! the warm air eventually cools and sinks back down to earth, and more cool air rushes in. this cycle continuously moves air and makes wind. when warm, less dense air _______, an area of low pressure is left behind. choose one option a rises b disappears c sinks d moves south

Explanation:

The text states "Because of this, warm air rises, leaving behind empty space with low pressure." So we need to find the option that matches 'rises'.

Answer:

A. rises