Answer:
Glucose is the substance produced during photosynthesis which provides food for plants and animals in a food web.
Step-by-step explanation:
The main source of energy in a food chain or food web is made by the producers. These producers are mostly plants that make food by the process of photosynthesis. As a result of photosynthesis, glucose is made as the main product whereas oxygen is made as the by-product. Glucose made is used to drive energy for all the activities of the cell. This energy, released from glucose, is carried within an ecosystem from one organism to another.