Answer:
it is long.
Explanation:
I know the answer but I don't know how to explain it
Temperature can be described as an indirect measure of heat energy
So therefore your answer should be letter C
Downstream, the current is helping the swimmer go faster relative to the land
The frequency f is related to the wavelength

by the equation

where v is the speed of the wave in the rope.
We can see from the formula that, if v is kept constant, smaller frequency means larger wavelength. So, the rope with frequency 2 Hz will have the longest wavelength.