Which of the following are warm ocean currents?

Ocean currents are classified as warm or cold based on their temperature relative to the surrounding water. The North Atlantic Drift is a warm current that originates from the Gulf Stream and brings warmth to Western Europe [3]. The Brazil Current is a warm western boundary current in the South Atlantic [1]. Conversely, the California Current is a cold eastern boundary current [3]. The Canary Current and Benguela Current are both cold currents located along the eastern boundaries of the North and South Atlantic respectively [3]. The West Wind Drift (Antarctic Circumpolar Current) and the Falkland Current are also cold currents [2]. Therefore, only the pair containing the North Atlantic Drift and the Brazil Current consists entirely of warm currents, as they transport tropical heat toward higher latitudes.

Sources

1. [3] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 32: Ocean Movements Ocean Currents And Tides > Canary Current – Cold > p. 492
2. [1] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 32: Ocean Movements Ocean Currents And Tides > Falkland Curre – Cold > p. 493
3. [2] Physical Geography by PMF IAS, Manjunath Thamminidi, PMF IAS (1st ed.) > Chapter 32: Ocean Movements Ocean Currents And Tides > Moderating Effect > p. 497