Multiple choice

____________ is not an example of an ecosystem.

  1. Aquarium

  2. Pond

  3. Desert

  4. Air

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An ecosystem requires both living (biotic) and non-living (abiotic) components that interact with each other. Air is only an abiotic component, not a complete ecosystem. Aquariums, ponds, and deserts all contain both biotic and abiotic components functioning together.