Annotated Bibliography provides:

The correct option is: A brief summary stating importance of the works cited/referred to in the research.

An annotated bibliography is a list of citations to books, articles, and documents, where each citation is followed by a brief descriptive and evaluative paragraph, called the annotation.
The purpose of the annotation is to inform the reader of the relevance, accuracy, and quality of the sources cited. It goes beyond a simple list of references by providing summary information and assessing the value of each source in relation to the research project.