1. How does the introduction of a new character, Mr. Dussel, change the Secret Annex? What problems or complications can arise from this additional person in the house?

Hello. You forgot to mention that this question is about "Anne Frank's diary". It is important that you always provide all the information necessary for your question to be answered, as you deserve.

Answer:

The introduction of Mr. Dussel, causes Margot Frank to leave the room that slept with his sister, Anne; and, go to sleep in the same room as your parents.

The addition of Mr. Dussel to the secret annex brought problems of coexistence between him and Anne, who disagreed with most opinions. This caused Mr. Dussel to have long complaints about Anne's behavior.

Explanation:

Anne Frank's diary tells the real story of Anne, when she was hiding with her family from the Nazis.

Anne and her family were Jews and were in great danger during the Nazi regime, so her parents decided to keep the whole family hidden so that they would not be taken to concentration camps.

Anne's family was not the only one in hiding, as they shared the space with the Van Daan family. Later they added another Jew to the hiding place, Mr. Dussel, who had to share a room with Anne, which generated many disagreements between the two, due to the divergence of opinions.