Question

The availability of water varies over space and time. Why?

Answer 1

Hey , my dear !

The basic factors of availablity of water varies on THE ATMOSPHERE (land comes in it . Ex - desert land .)

Sorry , Water doesn't varies on time periods. otherwise , you can take it in form of rain . which occurs in particular time periods.

Answer 2

The availability of water varies over space due at different places there are different affecting factors such as population,natural factors and surroundings