For waves in the ocean, the medium of the waves is a. air b. water c. energy d. a passing boat

It has to be:-
b. water
water waves are mechanical waves caused by the effect of external c.enrgy mostly from a.air and very little from motion of d.passing boats and it -like any other mechanical wave- requires a medium to be transported through which is b.water.
that's unlike electromagnetic waves such as light and X-rays