Why are enzymes necessary?

A) to regard the rate of decomposition
B) to act as a catalyst in chemical reactions
C) to conserve the stored energy of a cell

I’m not just going to give the answer it B XD but here’s why enzymes are both proteins and (biological catalysts.) (Catalysts accelerate chemical reactions.)

Hope this helped

The answer is a: the eggs have half as many chromosomes as the body cells