Which of the following refers to nekton?

Correct option is B

The correct answer is Active swimming.
· Nekton includes aquatic animals that can swim actively against currents.
· Examples include fish, squid, whales, and other strong swimmers.
· It contrasts with plankton, which drift passively.
· Immobile or floating organisms are not nekton.
Information Booster:
· Nekton is a category in aquatic ecology.
· Plankton → passive; Nekton → active; Benthos → bottom dwellers.
· Marine food chains depend heavily on nektonic predators.
· Important for fisheries and ecosystem dynamics.