Identify an example of organisms that are free-swimming and bottom-dwelling forms.

Zooplankton

The correct answer is Option (2) – Zooplankton

Zooplankton are organisms that drift or swim weakly in aquatic environments. They can be found throughout the water column, from the surface to the bottom. Some zooplankton species are capable of both free-swimming and bottom-dwelling behaviors, depending on various factors such as water currents, availability of food, and environmental conditions. These organisms play a crucial role in aquatic ecosystems as they serve as a primary food source for many aquatic organisms, including larger zooplankton, fish, and other marine animals. Examples of zooplankton include copepods, krill, and jellyfish larvae.