Only red algae can grow in relatively deep regions of the ocean because red algae are: Select one: a. capable of absorbing carbon dioxide even from the carbon-dioxide-depleted deep waters and using the carbon dioxide to build sugars during photosynthesis. b. specialized for absorbing shorter wavelengths of light that penetrate deeper into the water for photosynthesis. c. able to perform chemosynthesis rather than photosynthesis. d. capable of absorbing ultraviolet light for photosynthesis, rather than visible light.

b. specialized for absorbing shorter wavelengths of light that penetrate deeper into the water for photosynthesis.

Explanation:

There are two lights which are responsible for the photosynthesis in plants and algae i. e. red and blue light. These two lights are absorbed by the plants and algae in the process of photosynthesis while most of the light colors are reflected. In water red light remains in low depth while blue light penetrate deep into the water due to its shorter wavelength. So that's why red algae can grow due to the presence of blue light and photosynthesis occurs.

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!