Why are curfews established for teenagers?

Why are curfews established for teenagers?

（1）Teenagers tend to be rebellious yet vulnerable to negative influences, and inclined towards dangerous situations while staying outside after night falls. They should be protected from crimes on the one hand, and from violating laws themselves on the other.（2）Parents worry about their children’s safety and formation as a citizen. Curfews can serve as a method of ensuring teenagers’ security.