Oceanic plate crust is thinner and denser than continental crust, so the thinner oceanic crust gets bent and pulled under the continental crust. this creates a subtraction zone.
So I see at least three answers here that could potentially be correct, however I believe the best possible answer would be D. they distribute heat around the planet and are a major factor influencing the climate around the globe.
(The other two possibly correct answers would be A. and B. Animals such as Sea turtles will use the ocean currents as a means of quicker transportation and navigation. Sailors would also use the currents as a means of quicker transportation and navigation, however that is not required today with modern technological advances.)<span />
The answer is D.
Species diversity has been increasing through decades of years.
