Concept:Plants are natural noise reducers because they trap and take in sound energy.
Explanation:Ornamental plants have soft leaves, branches, and rough surfaces that absorb sound waves.
When sound hits these plant parts, its energy is soaked up instead of passing through.
This lowers the intensity and loudness of noise in the surrounding area.
Reflecting or scattering sound would simply send it elsewhere, not reduce it.
Absorption is the direct way plants cut down environmental noise pollution.
Answer:D. absorbing sound energy