Final answer:
Enzymatic activity is influenced by temperature, pH, and substrate concentration. Each of these factors can affect the rate of enzyme-catalyzed reactions, with enzymes having specific optimal conditions for activity.
Step-by-step explanation:
The factors that influence enzymatic activity include temperature, pH, and substrate concentration. Each enzyme has an optimum temperature at which it functions most efficiently, and elevating the temperature beyond this point can cause denaturation, thus reducing enzyme activity. Likewise, enzymes are typically optimized to work within a certain pH range, and deviations from this range can lead to decreased activity due to changes in the enzyme's structure. The availability of substrate also affects enzymatic activity, as an increase in substrate concentration can enhance enzyme activity up to a saturation point where all active sites on the enzyme are occupied.
Therefore, the correct answer to the question is All of the above.