Question

the domain of water is also referred to

Answer 1

hydrosphere should be the answer

Answer 2

$\huge\color{Orange}{Hey mate}$

here is your answer:

There are four major do aims of the environment.

Out of which the one that has water is referred to as $\bf\color{Blue}{Hydrosphere}$

hope it helps you!!

$\boxed{Thankyou!!}$