Answer:
The boy makes a new friend.
Explanation:
In this part of the story, the boy that is son of the general goes every day to see his new friend (the biy in striped pijamas) and talks to him about his day, what he often does, etc.
This happens every day, until one day, they decide to play together and the boy inside the prison brings the other one a striped pijamas just like his.
The son of the general wears it and enters with him to the prison without his family knowing, of course.
That day they incinerate some of the children inside the prison, including the two of them.
The general realizes his boy was one of them too late.
