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  • Our Environment - Ecosystems and Adaptations (Class IX)
  • An ecosystem must have a continuous external source of
Multiple choice

An ecosystem must have a continuous external source of

  1. food

  2. minerals

  3. energy

  4. water

  5. sunlight

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

An ecosystem must have a continuous external source of energy. This is the most appropriate option.

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