Why are there so few aquatic plants and phytoplankton that live at the bottom zones in the ocean?

a. the ocean floor contains many de composers
b. most sunlight is absorbed before reaching these levels
c. water is limiting factor
d. the temperature in these zones is extremely low

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.