Which two terms describe how waves of dim blue light are different from waves of bright red light?
O A Lower amplitude
B. Higher amplitude
OC. Shorter wavelength
O D. Longer wavelength

Although the two stimuli are very different in terms of composition, wave forms Two physical characteristics of a wave are amplitude and wavelength lower frequencies, and shorter wavelengths will have higher frequencies  At the top of the figure, the red wave has a long wavelength/short frequency.

i am pretty sure it is c because when people are closer together, they cannot move as freely. picture being in a mostly full elevator, for instance. the people are right next to you, and you can barely move.