The water table
a. rises and falls with precipitation
b. is the bottom layer of the saturated zone
c. is a layer of porous rock below an aquifer
d. always stays in the same place

The water table rises and falls with precipitation. The correct option among all the options that are given in the question is the first option or option "a". It is important to know what a water table is. It is basically the level below which the ground water that is present is always in a saturated condition. I hope it helps you.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

A,f, g are the points