Some precipitation that falls on land may soak into the ground, becoming groundwater.
Wells are usually used as a source for groundwater.
Wells can be filled with precipitation that falls on land and soaks into the ground.
What can be filled with precipitation that falls on land and soaks into the ground?
a: fields
b: Roads
c: rain
d: wells
e: nektar
f: porous
g: solutes
h: river