What are enzymes?
Please explain it as simple as you can

An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes.

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-Nezuko

An enzyme is a substance that is acting like a catalyst in living organisms while performing different tasks that a catalyst would.

Explanation:

"An enzyme is a substance that acts as a catalyst in living organisms, regulating the rate at which chemical reactions proceed without itself being altered in the process. The biological processes that occur within all living organisms are chemical reactions, and most are regulated by enzymes." (britannica.com)

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- Heather