His body showed a rejection reaction to the transplanted organ.

His single word triggered a chain reaction, and everything changed.

She overreacted to his words.

Nuclear reactions are used for mass production of energy.

I was surprised by his overreaction.

Benevolence is considered one of human virtues.

They decided to raid the enemy's camp.

Essential amino acids are vital nutrients for the human body.

Essential amino acids cannot be produced in the body, so they need to be obtained from the diet.

This reaction occurs through a chemical process.