Answer:
Bravery is the quality of standing up for what you want no matter the obstacles or challenges.
Albert Einstein was a brave man because his breakthroughs in science was met by persecution from religious leaders but his perseverance helped science become what it is today.
Hercules was a brave and courageous person, right from when he was a child and escaped death from two giant snakes. His bravery continued till his adulthood and he was known as the greatest warrior in Greece.