What makes waves in the ocean?

They ignored the moon because, although small compared with wind, it's tidal effect also adds to waves.

Tom, I think using “sun” as a choice was an acknowledgment of the moon because including it would make two correct answers.

Tom, thanks I wondered why the moon wasn't an option

The sun is also a correct response, as it helps create tides, which is a wave with a period of 12:25 or 24:50.

It could be argued that the sun heats up the landmasses, the resulting temperature differences create wind. (Did I get that right?)

The motion of the waves and tides is an untapped source of free - and clean - power. About time we tapped it.

And the wind comes from uneven heating by the sun...