The process by which green plants…
The process by which green plants, algae and some bacteria use energy from sunlight to make their own food. Inside chloroplasts, the green pigment chlorophyll absorbs light, which drives the conversion of carbon dioxide from the air and water drawn up from the soil into sugars such as glucose. Oxygen is released as a by-product, replenishing the air that animals breathe and forming the basis of nearly every food chain.
The answer in 14 letters
One definition, one title to guess: that's WordLocus. This one comes from a past challenge.