Multiple choice

What happens to an ecosystem behind a dam?

  1. Gets less water than usual.

  2. Becomes a desert.

  3. Becomes flooded.

  4. None of these choices.

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

When a dam is built, the water that is blocked accumulates behind the dam, which causes the area upstream to become flooded, creating a reservoir.