Explanation:

- Elegant: This word describes something characterized by refined grace, stylishness, or simplicity.

- Option 1, Graceful: Refers to showing grace or elegance in form and movement. Graceful is often synonymous with elegant.

- Correct Answer: Graceful, as both words are associated with beauty, refinement, and smoothness.

- Option 2, Intelligent: Relates to having a high mental capacity or quickness of understanding. Not directly related to physical grace or sophistication.

- Option 3, Common: Signifies something ordinary or widely shared. It lacks the sense of sophistication or beauty associated with elegance.

- Option 4, Rough: Indicates something coarse or uneven in texture or manner. It is the opposite of elegant.