What best describes a Stack Trace in the context of application errors?

A Stack Trace is crucial for diagnosing application errors because it provides a detailed list of the function calls that were active at the moment an error occurred. This information is vital for developers as it enables them to trace back the sequence of events leading to the error. By examining the Stack Trace, developers can identify exactly where in the code the application failed, which functions were involved, and the call hierarchy that led to this point. This context is essential for troubleshooting and fixing bugs, as it helps pinpoint the source of the problem within the application's logic.

Other options, while potentially related to application monitoring or user interactions, do not accurately describe a Stack Trace. For example, a record of the last user action focuses on user interactions rather than internal code execution, and a summary of application performance metrics pertains to the efficiency and speed of the application, not error tracing. A collection of previous log messages may offer insights into the application's behavior over time but does not provide the specific context of a failure that a Stack Trace does.