when people speak truth to power, at the risk of their freedom, social standing, family, friends, even their life

What dogboy said

just simple acts of kindness, like i would consider helping find an escapee dog an act of heroism. you don't need to risk putting yourself in danger to be a hero

https://en.wikipedia.org/wiki/George_(dog)

Risking your life to save a dog who fell into some white waters or a kind of waterway that's difficult to get out of.