What role do comments serve in code?

Comments play a crucial role in programming by documenting the code for clarity. They are annotations in the code that provide explanations, insights, or context for the logic implemented. This helps anyone reading the code, including the original author, other developers, or even your future self, to understand the purpose and functionality of specific sections of the code without needing to decipher the logic from scratch. Effective use of comments enhances code maintainability and readability, making it easier to troubleshoot and update the code as needed.

The other options do not accurately reflect the purpose of comments. For instance, comments do not enhance program performance, execute commands, or alter program logic; they purely serve as a supplementary tool for understanding the code.