100
The importance of family:
Contrast Harry's family in the muggle world (where he is miserable) to his family at Hogwarts (where he becomes a hero figure).
What is in the muggle world he is neglected and abused by his aunt and uncle, who consider him a burden. At Hogwarts he has a father (Dumbledore), a mother (Hagrid), and a brother and sister (Ron and Hermoine) that support and love him.