Imagine you're a cave person living thousands of years ago. You are minding your own business when suddenly a sabre-toothed tiger jumps out of the bush and growls at you. What do you do?
Option 1: You could run for your life, or…
Option 2: You could pull out your club and bonk it on the nose.
Option 1 is called flight (to run away) and option 2 is called fight. If a bully is picking on you at school, you have two choices: either walk away and ignore them, or punch him or her on the nose. If you ever find yourself in this situation, chat to an adult about how you should handle it.