If the author of the code is leading a code review for other developers and testers, what type of review is it?

When the author of the code leads a code review for other developers and testers, it is best described as a walkthrough. A walkthrough involves the author presenting their code to a group of peers, explaining the design and logic behind it, and discussing any specific areas for feedback. The focus is on the author's explanation of the work and on gaining insights and suggestions from the participants.

Walkthroughs are characterized by their collaborative and educational nature, where team members can ask questions and provide comments in a less formal environment. This approach encourages the sharing of knowledge among team members and helps identify areas for improvement in both the code and the overall development process.

The other options represent different types of review processes that serve distinct purposes. An informal development review typically lacks a structured format and might not involve the author directly leading the discussion. An inspection is a more formal and rigorous process, often involving specific checklists and roles assigned to participants. An audit, on the other hand, is typically a formal verification process that evaluates adherence to standards and regulations, rather than focusing primarily on a review of the code in a collaborative sense.