Final answer:
Displaying prejudice harms relationships; showing respect, doing unselfish things, and keeping in contact with people strengthen relationships.
Explanation:
Displaying prejudice is NOT helpful for maintaining strong relationships, as it leads to biased treatment and exclusion of group members. On the contrary, showing respect, doing unselfish things, and keeping in contact with people are crucial for fostering strong relationships by promoting tolerance, fairness, and positive connections.
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