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.
Answer:
4) The rate of species extinction is lower on the small island than on the large island.
Explanation:
The theory of island biogeography suggested that because of the size and links to the mainland. Fewer species that are not from the island will invade because the distance from the mainland is greater. The threat of extinction due to this is low. The small island also has a lower capacity for different species due to limited resources. This would mean that there are simply fewer species to go extinct.