This is the chemical reaction that occurs during photosynthesis; identify which of these is a product in this chemical reaction

I cannot find the proposition of the question, But I can show you the products of photosynthesis (there's two).

Photosynthesis is an energetic biochemical reaction that takes place in plants.

It takes six molecules of carbon dioxide and six molecules of water to synthesize a molecule of glucose, releasing six molecules of oxygen, thanks to the light energy.

6 CO2 + 6 H2O + light energy → C6H12O6 (glucose) + 6 O2.

So, the two main products are dioxygen (used by animals during breathing, and carbohydrates (organic substance) used as a source of energy.

the fossil record provides evidence of a common ancestor to many species.