Explanation:

Correct option 1: yellow

The correct answer is Yellow.

Because water is so good at absorbing light, the amount of light that gets through to the ocean declines fast (or is attenuated) as you go deeper.

Various wavelengths of light are absorbed at different rates by the oceans.

Longer wavelengths absorb first; red absorbs in the upper 10 m, orange around 40 m, and yellow around 100 m.

Shorter wavelengths penetrate deeper into the body, with blue and green light reaching the deepest levels.

Blue light penetrates deeply and is scattered by the water molecules, while all other colours are absorbed. Therefore, the water appears blue. Coastal water, on the other hand, is frequently greenish.