Maximum biomass of autotrophs in oceans is formed by

Options

A. Benthic brown algae,coastal red algae and dephnids
B. Benthic diatoms and marine viruses
C. Sea grasses and slime molds
D. Free-floating micro-algae, cyanobaceria and nanoplankton

Answer

D

Explanation

The greatest biomass of autotrophs in the word,s ocean is that of free floating micro-algae, cyanobacteria and nanoplankton. Phytoplanktons, diatoms and dinoflagellates are the dominant producers in the word,s oceans.