Question

the ______ vacuole helps regulate osmotic pressure in protozoa that live in a hypotonic environment. ribosome peroxide lysosomal contractile

Explanation:

Contractile vacuoles in protozoa in hypotonic environments collect and expel excess water to regulate osmotic pressure. Ribosomes are for protein - synthesis, peroxides are reactive chemicals, and lysosomes are for digestion.

Answer:

D. contractile