Multiple choice

When is a river said to be ‘dead’?

  1. When excess algae growth takes place in the river

  2. When dead bodies of organisms are released in the river

  3. When the river becomes highly polluted to sustain aquatic life

  4. When the river water becomes stagnant
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A river said to be ‘dead’ when the river becomes highly polluted to sustain aquatic life. 

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