Final answer:
Dynamic analysis is a type of code analysis conducted on a running application to detect issues like security vulnerabilities that are not visible in the static code.
Step-by-step explanation:
In Security Tools, dynamic analysis is a code analysis that is done using a running application. This method involves observing the behavior of a software application in real-time as it executes, typically to find issues that would not be visible in the source code alone. It contrasts with static analysis, which examines application code without executing the program. Dynamic analysis is often used to detect security vulnerabilities, performance issues, and application defects that manifest only when a piece of software is running. Key activities during dynamic analysis may include stress testing, fuzz testing, and monitoring system behavior under various conditions.