Answer:
I would go with A. Salinity and Temperature
a solar eclipse, when the moons shadow comes between the sun and earth
The answer is Wind
Oceant currents are driven by the circulation of wind above the surface's waters, interacting with evaporation, sinking of water at high latitudes.
You didn't put any answer choices but it's to stop the ozone layer from going away.
I looked all over the Internet, and saw that there is another option that you didn't include, and which is actually the correct answer.
Bays best facilitate the building of ports, not these options.