That's a simple part of evolution. Humans are built to adapt.
If we go in the frozen tundra, we make coats and other cold-blocking clothes. We find nearby food, like fish. Over time, our differences become more distinct from the rest, and we become less vulnerable to the cold.
Hope this helps! :)
Answer: d. Prejudice.
Explanation:
A prejudice is a pre-established conception about a person or a group, this conception is generally negative and is based on general (usually misleading) concepts about characteristics shared by the group; for example, the skin color of someone determines if it is friendly.
In this case, Kanza and Ranna have prejudices about people with fair skin and are judging their new classmate based only on the skin color that they have because they do not know their new partner.
I hope this information can help you.