How does La Niña affect the climate of the Pacific Ocean? The ocean becomes cooler.
The warm water moves toward the east.
The cold water sinks deeper into the ocean.
The strength of the prevailing winds decreases.

The way in which La Niña affects the climate of the Pacific Ocean is that: A. The ocean becomes cooler.

La Niña is a complex oceanic and atmospheric phenomenon that occur due to variations in ocean temperatures across the equatorial band of the Pacific Ocean, at a specific period of time in years. Also, it is a colder part of the El Niño-Southern oscillation climate pattern.

Basically, La Niña causes the surface winds blowing across the equatorial band of the Pacific Ocean to be stronger while reducing tropical cyclogenesis. Consequently, this causes the climate of the Pacific Ocean to become cooler.

Read more on La Niña here: link

The ocean becomes cooler

Explanation:

La Niña is a phase of a natural climate pattern which occurs across the tropical Pacific Ocean and swings back and forth every 3 - 7 years on the average.

Now, during La Niña, the surface winds across the entire tropical Pacific Ocean are usually stronger than they are on the average, and in return most of the tropical Pacific Ocean will become cooler than they are on average.

Thus, looking at the given options, the correct one is;

The ocean becomes cooler

where are the vectors ?