Answer:
2
Step-by-step explanation:
An ocean current is defined as the continuous or permanent movement of sea water which is caused by different forces such as the coriolis effect, wind, temperature, breaking waves and salinity differences.
Ocean currents play important role in climate changes of large water bodies as they transport cold water to the tropics from the poles and precipitation and warm water from the equator back toward the poles. Ocean current restricts uneven distribution of sunlight reaching earth surface which influence the temperature of air above water bodies. If there will be no ocean currents, the temperature of water bodies will be very hot and very cold at poles.
Hence, the correct option is 2.