Think back to our natural selection lab with the arctic foxes. What happened that caused changes in trait distribution in our population of foxes?
A the selection events killed off all of the foxes with beneficial traits
B the foxes randomly survived and mated regardless of their traits
C there was no variation in the fox population
D differences in survival and reproduction of individuals depending on their traits

D, I don't know what happened in your natural selection lab though so it might be wrong.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

so whats the answer