What approximate percentage of the earth’s freshwater is groundwater?
a.
10%
b.
20%
c.
30%
d.
40%

The correct answer is c. 30%

Explanation:

Groundwater is that found below the earth's surface. Groundwater is contained in aquifers. An Aquifer is a geological formation or a part of it, consisting of a permeable material capable of storing a certain significant amount of water. Aquifers can consist of different material, such as sedimentary permeable rocks such as sand stones or mud stones.

In general, it maintains a temperature very similar to the annual average in the area, therefore, in arctic regions, it can freeze.

Groundwater represents around 30% of the world's fresh water.

The correct answer is c. 30%

if you mean hydrogen and oxygen then water is the product