Final answer:
Glucose is the substance produced during photosynthesis that provides food for plants and animals in a food web.
Step-by-step explanation:
The substance produced during photosynthesis that provides food for plants and animals in a food web is glucose. Glucose is a simple sugar that is synthesized by plants using energy from sunlight, carbon dioxide from the air, and water from the soil. It serves as the primary source of energy for both plants and animals, and is used in various cellular processes to sustain life.
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