Final answer:
Enzymes work by reducing the activation energy required to start a chemical reaction, speeding up biological processes.
Step-by-step explanation:
The process by which enzymes work is by B. reducing the activation energy of a chemical reaction. Activation energy is the energy required to initiate a reaction. Enzymes are biological catalysts that speed up the rate of reactions in the body by lowering this barrier, allowing reactions to occur more easily and at a faster rate without being consumed in the process.