Section 4 pages 34-38 question 2

 The boy is probably about 9 or 10 years old. McCarthy never points this out but he is so skilled at subtlety and character that the boy's voice and tone gives us this impression. Despite the world ending, he still has a humility, curiosity and empathy that only a child can posses. He is mature enough to understand context yet he brings a pure childlike ethos that makes him almost Christ-like.