Question

which of the following is most likely a factor that could affect the rate of photosynthesis? carbon dioxide concentration soil type surrounding animals age of plant

Explanation:

Photosynthesis uses carbon - dioxide as a raw material. Higher carbon - dioxide concentration can increase the rate of photosynthesis. Soil type affects nutrient availability and water - holding capacity but not directly the photosynthesis rate. Surrounding animals generally do not have a direct impact on the rate of photosynthesis. The age of the plant can affect overall health and photosynthetic capacity to some extent, but carbon - dioxide concentration is a more direct and significant factor.

Answer:

carbon dioxide concentration