This is a discussion prompt, so there isn't one correct answer. Here are some ideas based on the text:
Harriet goes to ... *an international school or a cross-cultural project.*
There are ... *people from different countries.*
Everyone has ... *different religions and lifestyles.*
They ... *learn about each other's cultures and communicate with others.*
Harriet has learnt ... *a lot about different cultures and made great friends.*
International schools ... *offer opportunities to learn about different cultures in a real-world setting and participate in various activities.*