Which of the following are run-on sentences

Messalla frowns at the wide circular cover, for a moment returning to his own fussy world.

What do the excerpts have in common? both point out the tragic nature of situations in which children make journeys without their parents. both describe what immigrant children must do to survive when traveling to the united states. both explain why most children want to leave central america without their parents. both indicate the tragic problems and their consequences that children in central america must face.

Why do u think the boys care so much about being called by their nick names from the movie holes