How did joby join the army? why is this important to the story? (story - the drummer boy of shiloh)

He ran away from home and joined. it makes him feel self-aware of his young age, and it isolates him from the rest of the army. He also has no family support, so that makes him feel alone

the correct answer is:

this is an example of the writer telling through description rather than showing through dialogue.

sometimes writers like to explain explicitely what's happening instead of adding dialogues of the situations., which is the case in this passage,

b. he wants to keep from being identified by former masters.

explanation: