Question

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

Explanation:

The prefix "hydro" means "water". The term "hydrosphere" is formed with this prefix, so it should relate to water. The option "The rock part of the Earth" is incorrect (that's the lithosphere), while "The watery part of the Earth" matches the meaning of "hydro" (water) in "hydrosphere".

Answer:

The watery part of the Earth