Which is most likely to cause clouds to form in a previously clear sky?(1 point)

Question

Responses

A warmer air mass moves into the area and rises.
A warmer air mass moves into the area and rises.

A colder air mass moves into the area and rises.
A colder air mass moves into the area and rises.

An air mass sinks and becomes colder.
An air mass sinks and becomes colder.

An air mass sinks and becomes warmer.

Answer 1

A warmer air mass moves into the area and rises.