Most filter-feeding whales have calls between 15 to 25 hertz, but one type of filter-feeding whale has a much higher frequency, at 52 hertz. What likely differs between the two whale calls?
The distance from crest to crest
The height of the waves
The time it takes for successive crests to pass through a point
The vertical distance between the trough of a wave and the closest crest

Question

Most filter-feeding whales have calls between 15 to 25 hertz, but one type of filter-feeding whale has a much higher frequency, at 52 hertz. What likely differs between the two whale calls?
The distance from crest to crest
 The height of the waves
 The time it takes for successive crests to pass through a point
 The vertical distance between the trough of a wave and the closest crest