Me put the waves in order from highest frequency to lowest frequency
a b c

The awncer is B then C then A

so its B,C,A

B then C then A. B has the highest frequency because the waves are closer together.

''The work-energy theorem describes work as the change in energy brought about by the change in velocity. , the environment has done work on the object and the energy of that object is increased. When the velocity of an object decreases, the object has done work on the environment and the energy of the object is decreased''.