Question

How does the circulation of air takes place?​

Answer 1

Answer:

When air is heated, it expands, it becomes lighter and goes up. Cold air is denser and heavy. That is why it sinks down. When hot air rises, cold air from surrounding area rushes there to fill in the gap. That is how air circulation takes place.

I hope this is what u needed.....

Answer 2

Answer:

by breathing in and breathing out of air