Summary of chapter 5, sea of monsters?

Which three parts of these excerpts reflect the idea that war affects not only the minds of the combatants but also their physical reactions?

How can rereading a passage to clarify the meaning of a later one?

You are reading an informational text for english class, and you find a lot of words you don't know. your teacher says you don't need to look up all of them in the dictionary, only the ones you need to get the main point of the text. how could text features you figure out which words to look up?