Sympathy is when you feel sorry for someone because they are having a hard time.
Sympathy is a kind feeling. It means you care about someone else's feelings.
Examples:
I have sympathy for my friend who is sad.
She showed sympathy for the hurt bird.
He feels sympathy for the sad dog.
The cat has sympathy for the mouse, but it still chases it.
I have so much sympathy for the crying baby.
She showed sympathy by giving her friend a hug.