Answer:
1) When her mother offered her food, it was the first time she wasn't hungry. That was a new thing for her. She also never imagined she would be free. So, to see that man tell them after crossing the river, they will no longer have to hide.
2) They started ro say to each other that they were proud of each other and at the end the Mother says, "Almost there" which means its leaning towards the end of the journey.
3) That in the end there is always a way out. To never give up.
4) The theme chart: The one reason from this chart that is already given is from chapter 9, so you have to do the rest on your own since you read all the chapters.
Hope this Helps!
:D