Explanation:
Downwelling is the process where cold and heavy dense water moves down into the ocean floor and warm light dense water rises to the surface. As a result of downwelling, the water high dense water which rises to the water surface brings the oxygen rich water to the surface for the marine animals to breathe properly. Also when the ocean surface water becomes little warmer it becomes a little comfortable for the marine animals to survive in this severely cold climatic conditions at polar reasons.
Locations X and Y are at the poles. Hope this helps!
You have to divide 3000 miles with the 5 and it gives you a velocity of 600
Both are at the side of the spectrum that has the lower frequency