Answer: Option a
Step-by-step explanation:
The structure of the enzyme fits in its substrate and this allows the enzyme to catalyze the reaction.
The main function of the enzyme is to boost the chemical reaction.Boosting the chemical reaction means that there is a increase in the rate of reaction.
This increase in the rate of reaction takes place by decreasing the activation energy which in turn increases the rate of reaction.
Hence, the correct answer is Option A