Answer: Option A
:
Definition: 1 Mark each
Infiltration: The process of water seeping into the ground through the soil is called infiltration. 
Infiltration refills the groundwater.
Aquifer: The spots where the groundwater is stored between layers of hard rocks below the water table are known as Aquifers.
It is a source of fresh water.
Drip Irrigation: Drip irrigation is the process of supplying water to plants by making use of narrow tubings which deliver water directly to the base of the plant.
Drip irrigation is a more efficient way than sprinkling water as it saves a lot of water.