The uppermost part of the oceans, as expressed by normal ocean waves, are in constant motion due to the effects of the

ANSWER:

The 'uppermost part of the oceans', as expressed by normal waves are in constant motion due to the effect of the 'wind'.

EXPLANATION:

The wind is considered as the mode of transportation for various sediments that is available around our atmosphere. One component wind carries are the sediments and other are from the liquid and ice. If there is a conflict or if the sediments occur, then there are condition where energy level decreases due to which the uppermost part of oceans are in constant motion.

I'm pretty sure it's c. extremely gradual but not 100% sure though.

Answer (d) may increase or decrease porosity through dissolution or deposition;