Step 1: Understanding Antonyms:
In this case, we are looking for the opposite of the word "common," which means something that is usual or widely occurring.
Step 2: Analyzing the Options:
- Ordinary: This is similar to "common," as both refer to something that is usual or not special. It is not the antonym.
- Rare: This is the correct antonym of "common." "Rare" refers to something that is infrequent or uncommon, which is the opposite of "common."
- Natural: This refers to something that is inherent or occurring in nature, but it is not an antonym of "common."
- Beautiful: This refers to something that is visually pleasing, and it is unrelated to "common."
Step 3: Conclusion:
The correct antonym of "common" is rare.