Why are comments used in an algorithm?

Comments in an algorithm serve a crucial purpose by breaking down steps and providing explanations for the reasoning behind certain decisions or procedures within the code. This practice enhances clarity and readability, making it easier for both the original author and others who may work with the code in the future to understand its functionality and logic.

Including comments can describe the purpose of specific sections, outline complex algorithms, or provide context that may not be obvious from the code itself. This is especially valuable in collaborative environments where multiple developers may interact with the same codebase, allowing for smoother collaboration and maintenance.

On the other hand, the other options focus on aspects that do not align with the practical use of comments. For instance, adding unnecessary information does not contribute to clarity and can instead clutter the code, while increasing the size of the code without purpose is generally not desirable. Moreover, confusing other developers does not support effective communication within the coding community, which comments are intended to facilitate.