Eastward flow of equatorial counter-current

The equatorial counter-current flows eastward due to the convergence of the two equatorial currents (North and South Equatorial Currents). When these westward-flowing currents meet and converge, they create a backflow or counter-current that flows eastward between them. This is a direct result of mass transport and conservation of water mass. The Coriolis force (related to Earth's rotation) actually deflects the trade wind-driven equatorial currents westward. The salinity difference and calm belt are not primary drivers of this particular current. > Equatorial counter-current = Convergence of two equatorial currents pushing water eastward. Answer: (b).