Which of the following best describes the role of an informant?

The role of an informant is best described as a person providing crucial information about a case. An informant typically possesses knowledge that can significantly aid law enforcement or investigators in understanding the details of a situation, often sharing insider information that may not be publicly available. This information can be critical in building a case, solving a crime, or providing insights into ongoing investigations.

In contrast to the other roles mentioned, an informant does not merely share personal opinions, mediate settlements, or make legal decisions. Instead, their primary function is to deliver essential information, often based on firsthand knowledge or experience related to the matter at hand. This distinction highlights the unique importance of informants in various investigative and legal contexts.