2017 · Q105
Free swimming macroscopic animals in an aquatic environment are referred to as
general-sciencebiology-human-body
- APlankton
- BPeriphyton
- CBenthos
- DNekton
Explanation
Nekton are the free-swimming macroscopic animals of aquatic environments, such as fish. Plankton drift with currents, periphyton grow on submerged surfaces, and benthos live on the bottom. Hence (D).