The correct answer is option B
The process by which the organisms have green pigment chlorophyll make food by the help of sunlight is called photosynthesis.
Green plants, protists and bacteria perform photosynthesis and are called as autotrophs.
Some photosynthetic protists like phytoplankton and algae performs the process of photosynthesis. They drift into the ocean and performs photosynthesis.
The cyanobacteria perform the process of photosynthesis deep inside the sea and produced oxygen and food for the marine environment.
