Um..... no one can answer this.... because we didn't read the story.... but my answer is: He might not have seen his dad in a long time and he was scared to see him again. Or: He is just afraid. Sorry if this does not help.
By what I've learned, it's called a HYMN
A medium refers to the materials that are used to create a work of art. The plural of medium is media? I think that is it.
