Which of the following processes has directly caused ocean currents to change over earth's history? a. ice-albedo feedback b. continental drift c. axial precession d. volcanic activity

Option (B)

Explanation:

The continental drift is defined as the shifting of the continents over the large water body with respect to the poles. These continents moved from one place to another across the line of different latitudes and longitudes, experiencing various types of climatic conditions, due to which the ocean water currents has been significantly affected. This presence and continuous motion of continents affects the direction of the ocean currents that moves from the equatorial to the polar region.

Thus, over the earth's geological history, the ocean currents are undergoing changes due to the continental drifting.

Hence, the correct answer is option (B).