Step-by-step Analysis:
• The word redress means:
• to correct a wrong,
• to remedy a grievance,
• to provide compensation,
• to set right an injustice.
• Examine option (A):
Set right means to correct a mistake.
Therefore, it is a synonym of redress.
• Examine option (B):
Remedy means to cure or correct a problem.
Therefore, it is also a synonym.
• Examine option (C):
Retribution means punishment or vengeance.
It represents a concept opposite to the restorative nature of redress.
Therefore, it is accepted as an antonym in this context.
• Examine option (D):
Harm means injury, damage, or hurt.
Since redress aims to repair damage, harm is clearly opposite in meaning.
Therefore, it is an antonym.
• Hence, the words opposite in meaning to redress are:
\[
(C)\ \text{Retribution}
\quad \text{and} \quad
(D)\ \text{Harm}
\]
Thus, the correct answer is (C) and (D) only.