Final answer:
Deforestation reduces the number of trees that use carbon dioxide and store carbon, impacting the availability of free energy to organisms in the rainforest.
Step-by-step explanation:
The impact of deforestation on the reactants and products of photosynthesis is profound and multifaceted, affecting not only the environment but also the organisms, including humans, that rely on it for survival. Photosynthesis uses water, carbon dioxide, and sunlight to produce glucose (sugar) and oxygen. Deforestation decreases the number of trees that absorb carbon dioxide and perform photosynthesis, leading to increased carbon levels in the atmosphere. Reduction in forest areas compromises the availability of free energy in ecosystems because trees are primary producers that convert light energy into chemical energy stored in glucose. This loss of trees limits the energy source for other organisms in the food chain.