What is the meaning of the word that refers to helping to clarify or explain?

The correct choice refers to the action of making something clearer or easier to understand, which is precisely captured in the term "illuminate." In this context, to "illuminate" involves shedding light on a subject, thereby enhancing understanding. This is often used metaphorically to signify that the information provided helps readers or listeners gain clarity about a particular topic.

The other choices, while they might imply some degree of improvement or enhancement of understanding, do not specifically convey the idea of clarifying. For instance, "enhance" generally means to improve or augment something but does not specifically denote making it clearer. "Clarify" directly references the act of making something clear, but "illuminate" conveys a broader sense of enlightening and shedding more light on complex ideas or topics. "Illumine," which is a less common term, also relates to the idea of providing light, but in contemporary usage, "illuminate" is more widely recognized and understood in the context of explaining or clarifying information.