11. christopher's conversations with siobhan, his teacher at school, are possibly his most meaningful communications with another person. what are these conversations like, and how do they compare with his conversations with his father and his mother?

Siobhan is encouraging to Christopher and enjoy talking with Christopher. The parents are mostly discouraging to Christopher, but this is seems not true in that they need to provide for him on daily bases. This pattern is similar for many of us 'normal' people (parents seem to be discouraging while others seem more encouraging.)

Explanation:

Christopher often mentions Siobhan when describing the aspects of human communication with which he has trouble. We assume it's through her that he's at least learned how to be polite and found out about this strange way of talking called "chatting." But our favorite Siobhan moment is when she reads Christopher's detecting book and offers to talk to him if he's feeling sad about what he's learning about his mother.

the red coloration of the lungs looks alarming and adds to the overall message that the flu is threatening apex

there is no short story here so that i can answer the question.