Before rainfall by which process do water droplets form in clouds?

Correct answer: Condensation

Correct answer: B, condensation. Water first evaporates from the Earth’s surface and becomes invisible water vapour. When moist air rises, it generally expands and cools. If it cools sufficiently, the vapour changes back into tiny liquid droplets or, in very cold conditions, ice particles. This change from gas to liquid or solid is called condensation. The droplets often form around tiny particles such as dust or salt, called condensation nuclei. Many droplets together make a cloud; when they grow large and heavy enough, they may fall as rain. A, erosion, is the wearing away and movement of soil or rock. C, salinity, means the amount of dissolved salt. D, tide, is the regular rise and fall of sea level. None of these forms cloud droplets.