The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
In this chapter, Koch reminds us that the differences students bring into the classroom are a gift.
This is so true because diversity means the opportunity to learn new things from different perspectives, backgrounds, and cultures. Every single student in the classroom is unique. And this diversity is what allows the class to learn, improve, respect differences, and instill the value of tolerance, knowing that each student has something good to share.