Answer:
The right answer to this question is option A. Catalysts increase the velocity of chemical reactions.
Explanation:
Catalysts can be lots of things, it can be a specific substance to a chemical reaction that helps this reaction to happen faster, or even an enzyme. A catalyst, or, a biological catalyst, is mostly recognized as enzymes, and enzymes work in a system called lock-key system. So for the reaction to happen, a specific substrate needs to enter in a specific enzyme, and when that happens, the reaction happens faster than before.
