In a way,green plants and cyanobacteria have synthesized all the food on the earth. Comment.

(N/A) Cyanobacteria are prokaryotic organisms that possess photosynthetic pigments like chlorophyll $a$,phycocyanin,and phycoerythrin,which give them their characteristic blue-green color. They perform oxygenic photosynthesis,producing food for themselves and supporting aquatic food chains.
Green plants are multicellular eukaryotes that perform photosynthesis in chloroplasts using $CO_2$,$H_2O$,and light energy to produce glucose.
Together,these two groups are the primary producers on Earth,forming the foundation of almost all food webs by converting solar energy into chemical energy,thereby sustaining life on the planet.