Question

in which conditions rainfall occurs​

Answer 1

 1) The air must contain water vapor that can precipitate, 2) the moist air must cool down in order to release water in liquid form, and 3) there must be condensation nuclei for water vapor to condensate on.

Answer 2

Answer:

Within a cloud, water droplets condense onto one another, causing the droplets to grow. When these water droplets get too heavy to stay suspended in the cloud, they fall to Earth as rain.