Enrique puts Chiapas behind him. He still has far to go, but he has faced the beast eight times now, and he has lived through it. It is an achievement, and he is proud of it. The excerpt refers to Chiapas as "the beast.” What is the purpose of using this metaphor in the excerpt?

to show how threatening travel through Chiapas is
to show that few people are able to live in Chiapas
to show how many dishonest people live in Chiapas
to show that Chiapas has the most immigration checkpoints