wavelength| The distance between one peak or crest of a wave of light, heat, or other energy and the next corresponding peak or crest. amplitude| The height of a crest (or the depth of a trough) of a wave.
its d because if you get rid of trees then your gettign rid of homes and its increses soil erosion from there being no roots of trees decresed biodiversty form the lack of homes and decresed quality of air because theres no trees to make oxygen