Short Answer 
The terms Marriage, Wedlock, and Matrimony all relate to the union of individuals, while Divorce stands out as it signifies the legal dissolution of that union. Therefore, Divorce is identified as the odd one out since it represents the end of a marital relationship, contrasting with the other terms that celebrate marriage.
Step 1: Identify the Terms
Examine the list of terms: Marriage, Wedlock, Divorce, and Matrimony. Understanding the meaning of each term is critical for identifying the odd one out. The first three terms relate to the practice of being married and the union of individuals, while one term stands apart due to its distinct meaning.
Step 2: Analyze Their Meanings
Explore the meanings of the terms to see how they connect:
- Marriage – The legally recognized union between two individuals.
- Wedlock – The state of being married or the condition of marriage.
- Matrimony – A formal term for marriage, emphasizing its religious or ceremonial aspects.
- Divorce – The legal dissolution of a marriage.
Step 3: Conclusion – Identify the Odd One Out
Based on the analysis, conclude that Divorce is the odd one out. It indicates the end of a marital relationship, contrasting the other terms that represent the beginning or state of marriage. Therefore, while Marriage, Wedlock, and Matrimony celebrate the bond, Divorce signifies its conclusion.