Why is the pictures important in this book?

 In Persepolis, there are lots of pictures in the books, and it is like a caricature,but it is not. The pictures are very important in this book. On page47, the political prisoners were liberated a few days later, there are about 3000 people in there. In this picture, we can see 2 parts of people are embrace, a part of people are men, other part of people are children and women. They missed each other, and they are very excited. On page 64, Marjain is very sad to say good bye to her family. She cried in her mom's hug. In this picture, I know she don't want to  leave her family, but she can't choose. So, I think pictures are very important in this book.