Which type of environmental scientist is likely to study methods of water conservation and decontamination?

a. Hydrologist

b. Toxicologist

c. Oceanographer

d. Ecologist

a. Hydrologist

Hydrologist are the person behind the scientific study of water, its process, significance, formation, history and how it affects the environment in both small and large amassing scale. While, Toxicologist study different kinds of toxins in different forms, gas liquid or even solid forms.