Some single-celled protists, such as paramecia, live in an extremely hypotonic environment and have contractile vacuoles that

The single celled protists which is one of the example of this is the paramecia survives and lives on extreme hypotonic environment. They have the ability of having to contract their vacuoles in which this contributes and help them to live and survive in a hypotonic environment.

they absorb it i think

not sure

you