The word “photosynthesis” is derived from the words "phos" (which means “light”) and "σύνθ-εóîς" (which means “combiningtogether.”) And so it means “combining together with the help of light.”
The process of photosynthesis occurs in (the primary producers in a food chain) and a few other autotrophic organisms such as cyanobacteria, purple bacteria and green sulfur bacteria.