Answer:
he is scared of the dark
Explanation:
The fear of the dark or nymphophobia according to researchers is the fear without reason to the night or to the dark spaces, generated by a thought of the brain of the actions that could happen in those circumstances.
If Jake is in the ruins while there is daylight it will be fine, but at the time of nightfall, he will think of all the bad things that could happen to him or his friends if they cannot leave on time or cannot see anything when they leave the ruins.
