Which component of container terminology describes everything needed to run an application?

The correct choice is the "Image," which refers to a packaged version of an application that includes all necessary components, such as code, runtime, libraries, and dependencies, required to run the application in a containerized environment.

An image acts as a template from which containers are created. It contains everything the application needs to operate, ensuring that it can run consistently across different environments, from development to production. This encapsulation makes it easier to deploy applications in a standardized manner.

The other terms are related but serve different purposes: the repository is where images are stored and managed; the registry is a service for storing and distributing images, often associated with a specific repository; and the container itself is a running instance of the image, providing the environment in which the application operates. However, the image specifically represents the whole package necessary for application execution.