What unusual pattern occurs during el nino a: cool water flows along the east coast of south america b: the trade winds strengthen c: warm water flows from the western tropical pacific toward south america d: warm water flows north alng west coast of south america

C: Warm water flows from the Western Tropical Pacific toward South America.

Explanation:

El Nino can be define as a climate cycle typically in the Pacific Ocean which results in the change in the weather pattern globally. The climate cycle develops when the warm water from the western tropical region of the Pacific Ocean moves towards the east and finally along with the equator it moves towards the coast of South America.

B, the trade winds weaken, or even blow backwards.

Explanation:

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