Hang-dog originally means if you say that someone has a hangdog expression on their face, you mean that they look sad, and often guilty or ashamed.
Answer:
Jamie feels uncomfortable near Margaret.
This would be the right choice!
A topic is what the paper is about, a theme is sort of how a story is set. For example, maybe my topic is danger, so I use that through the theme of snow
Because the moon feels left out, but the moon is needed
Answer:
When they go to bed and what makes them stay up late
Explanation:
She would most likely need to know what time they go to bed because that could be a large factor in when they sleep. If they go to bed at 9 pm, then they wouldn't really benefit from a later sleep because they only get a few hours of sleep even if school started later. Meanwhile students who go to bed later would certainly benefit from the earlier start time.
Also she would need to know why they go to sleep late. For example, homework makes them stay up late because they need to finish their assignments, work on projects, study, etc. Another example is after school activities, students could arrive home late due to sports and have to eat dinner right as they come back, forcing them to do work late at night.