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WAEC Agricultural Science 2012 Question 32

Question 32

Ornamental Plants

Ornamental plants reduce noise pollution in the environment by

  1. A.scattering sound energy.
  2. B.reflecting sound waves.
  3. C.dispersing sound waves.
  4. D.absorbing sound energy.
Show the answer and explanation

Answer: D (absorbing sound energy.)

Explanation

Hedges and trees act as noise barriers: their leaves, twigs and stems absorb sound energy, so less noise reaches people behind them.