Question

The actively moving organism in aquatic ecosystem is ______.

• A. Phytoplankton
• B. Benthos
• C. Nekton
• D. All of the above

Answer 1

The correct option is C Nekton

• Phytoplankton are microalgae that contain chlorophyll and require sunlight for living.
• Benthos are benthic organisms found in the deep surface of the sea.
• Nekton are heterotrophic living organisms, who swim and move independently of water currents. Examples of nekton are an octopus, shark, etc.

Hence, the correct answer is option C, i.e., Nekton.