Answer: Option 2: Stubby was a stray that had proved himself in battle.
Explanation: It makes the most sence based on the short story. Also they asked why they took him on the battlefield, not why the kept him in general.
Rather than depend solely upon visual unity, an artist will sometimes create CONCEPTUAL unity by unifying the ideas in a work of art. :) Hope this helps
designers get a feel for the personality of the person which can sustain a working relationship . Communication is the most important part of the process.