Surface currents in the ocean are more important a. they the animals migrate from place to place. b. the movement creates waves that boats travel the ocean. c. the current keeps circulation moving through the ocean so plants can grow. d. they distribute heat around the planet and are a major factor influencing climate around the globe.

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.)

I'm not 100% sure, but I'm pretty confident that the answer is D. Sorry if I'm wrong!