What does a 'caption' typically provide in relation to an illustration?

A caption typically provides a title or brief explanation of the illustration it accompanies. This helps to clarify the context or content of the image, enabling the reader to understand what they are looking at and how it relates to the surrounding text. Captions often summarize key points or highlight important details depicted in an illustration, enhancing the overall comprehension of the material.

In contrast, some of the other options involve more extensive or different types of information. For instance, a detailed analysis of the content would require much more context and depth than what a caption provides. Similarly, a list of related sources might be useful for further reading or research but does not serve the immediate purpose of offering context to an illustration. Lastly, comparing different works implies a level of critical evaluation and comparison that is beyond the straightforward information typically offered by a caption.