Question

why are there \year - rounders\ at camp half blood? they are in search of their true parents. it is too dangerous to leave. they are not permitted to live in the mortal world.

Explanation:

In the "Percy Jackson" series, Camp Half - Blood is a safe haven for demigods. Year - rounders stay because the outside world is fraught with dangers from monsters and other threats that target demigods.

Answer:

It is too dangerous to leave.