Question

What explains the eastward flow of the equatorial counter-current?  

(a) The Earth's rotation on its axis 

(b) Convergence of the two equatorial currents 

(c) Difference in salinity of water 

(d) Occurrence of the belt of calm near the equator

Answer 1

(a) The Earth's rotation on its axis explains the eastward flow of the equatorial counter-current. The earth would have been rotating east to west, the piled up water would have come down on the west side. Therefore, essentially it's the earth's rotation that explains the eastward flow of equatorial counter current