Which process contributes to the formation of ground water

Percolation

Explanation:

Percolation is the process of a liquid slowly passing through a filter. Percolation comes from the Latin word percolare, which means "to strain through." Percolation happens when liquid is strained through a filter, like when someone makes coffee.

Percolation is the water cycle process by which liquid water flows through the soil due to the force of gravity.