Explanation:
Poverty: when there is no money to further his/her education the person tends to drop out on the way because of lack of money. Peer influence: When you follow bad friends who smokes and are rugged you will see education as scam because he/she wants to belong.
Mental ill health: When someone is suffering from mental disorder that person can not stay in class without causing havoc.
Economic system
Family background
Ethnicity etc