The sun's heat provides the heat needed for evaporation. The drop of water changes from a liquid to a gas.
The drop of water has met with other drops and has formed a cloud through condensation. The cloud then gets denser than the air and falls due to gravity. This is called precipitation.
The drop of water has fallen into a river and flows downstream (runoff) because of gravity. It will eventually meet up with an ocean and go through the cycle again.
The water could also go through infiltration. It would fall on land and gravity would make it filter through empty pockets and air holes in soil and rocks. It would eventually reach an impermeable layer and an aquifer would be created. Eventually, the water would reach an ocean.
The water could also fall on land and be taken by a plant's roots. transpiration would the occur, and the water would be released as water vapor, a gas. It could also be drank by an animal and transpiration could also occur then, when an animal breathes in and out.