Question

the prefix hydro means \water.\ what does the hydrosphere refer to?
the watery part of the earth
the rock part of the earth

Explanation:

The prefix "hydro" means water. The term "hydrosphere" combines "hydro" (water) with "sphere" (a region or part). So, it should refer to the part of the Earth related to water. The option "The rock part of the Earth" is incorrect as that relates to the lithosphere.

Answer:

A. The watery part of the Earth