Oceans and Seas

As waves approach the shore, interaction with the sea floor slows the waves down and the crests of the waves bunch up. They increase in height as the energy in each wave compresses into a shorter horizontal distance, but the period of the wave does not change. Eventually, the waves break.

An 'old river'.

The mouth of a stream is where the stream flows out into a larger body of water.

They are wet.

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Wetlands form an important environment for aquatic plants and animals. They are also a haven for migrating birds that have retreated from the bitter northern weather, to overwinter in milder climes.

ocean waves

headwaters

the sun's rays strike the water more directly near the equator.

Water in the blue currents is colder, saltier, and denser than water in the red currents

I guess it’s lunar tides

limnetic

The ocean receives most of its heat along the equator, where incoming solar radiation is about double that received at the poles. Hence, sea surfaces are much warmer along the equator than at the poles.