Photosynthesis is essential for the survival of most life forms because it is the process by which green plants, algae, and some bacteria convert sunlight into energy in the form of glucose. This glucose is used as a source of food and energy by these organisms and is the basis of the food chain. Without photosynthesis, most life forms would not have access to this vital energy source, leading to a breakdown in the ecosystem and ultimately threatening the survival of many species.
