The correct option is B Algae and Phytoplanktons
Biomass is the organic matter obtained from the living organism which act as a source of energy. In a biomass pyramid, the trophic levels are sequentially arranged at the trophic level according to the biomass at each level. The bottom of every pyramid is made up of autotrophs ( producers). In ocean, the phytoplanktons and algae are the primary producers of the marine food chain.