_____________ events begins with large-scale warming of surface water in the central and eastern equatorial Pacific Ocean.

Correct option is A

El Niño is a climatic event that begins with the large-scale warming of surface waters in the central and eastern equatorial Pacific Ocean.
· This phenomenon can significantly impact global weather patterns, leading to changes in precipitation, temperature, and atmospheric pressure across different regions.
Explanation:
· (a) El Niño – Correct answer. El Niño involves the warming of sea surface temperatures in the central and eastern Pacific Ocean, affecting weather conditions worldwide.
· (b) La Niña – La Niña is the opposite of El Niño, characterized by the cooling of sea surface temperatures in the central and eastern Pacific Ocean.
· (c) Southern Oscillation – The Southern Oscillation refers to the periodic reversal of pressure systems between the Pacific Ocean and the Indian Ocean, often associated with El Niño and La Niña events.
· (d) Trans-Niño – This is not a recognized climatic event or term.