Sand worms.
It keeps the hot air from leaving your house.
she hates you
gravity
It keeps the rain off. It keeps warmth in. It keeps robbers out.
keeps it cool
Jones Keeps House - 1917 was released on: USA: 8 January 1917
yo moma hahAA
the shell keeps the egg from drying out by that I mean it keeps it moist or by leaving it it a wet dry area
you have to use skills
He guards the Gates of Hades and keeps the ghosts of the dead from leaving the Underworld.
The Speaker
Keeps the population of other species in check.