Question

why are water towers often tall and placed on high ground?
a gravity pushes water from the tank into the pipes.
b pumps help get water to the top floors of tall buildings.
c tanks hold water in case of fires or emergencies.
d pipes are built to only hold up to low water pressure.

Explanation:

Water towers use the principle of gravity. The height gives potential energy. When water flows, this converts to kinetic energy. Gravity - driven flow is key for distribution. Option B is about pumps (not related to tower height). Option C is about storage (not height reason). Option D about pipe pressure (not relevant to tower design).

Answer:

A. Gravity pushes water from the tank into the pipes.