Question

deep in ocean ;sunlight can hardly reached,yet there are plants such as brown and red algae found here.how do you think they are able to synthesize

Answer 1

Plants in deep ocean receive oxygen from water and get access to sunlight.
Due to presence of chlorophyll, pigments of red and brown help in masking predominant green pigments of photosynthesis. 
As a result, they easily prepare their food and survive for long. After their death, they fall down.

Answer 2

Answer:

Explanation:

Plants in deep ocean receive oxygen from water.

Due to presence of chlorophyll, pigments of red and brown help in masking predominant green pigments of photosynthesis.

As a result, they easily prepare their food and survive for long. After their death, they fall down.