El-Nino is the name given to-

The correct answer is Option (1) → The periodic development of warm ocean currents along the coast of Peru

El-Nino is the name given to the periodic warming of the ocean off the coast of Peru and Ecuador in the eastern Pacific, appearing every few years (roughly every 2 to 7 years). A warm current replaces the usual cold Peru (Humboldt) current there, which disturbs fishing along the coast and the weather of many regions, including a weaker Indian monsoon.

Its name, “the little boy” or “Christ child” in Spanish, comes from its appearing around Christmas.