Which of the following actions can be classified as an automation action?

The action that aligns with automation in this context is the Pull Request. A Pull Request is a critical step in the software development lifecycle, particularly when using version control systems like Git. This process automates the workflow of integrating changes made by developers into a shared codebase.

When a developer creates a Pull Request, it triggers a series of automated actions, such as code reviews, tests, and integration processes. The automation aspect streamlines collaboration, ensures that code adheres to quality standards, and reduces potential conflicts that might occur when multiple developers work on the code simultaneously.

In contrast, Continuous Integration focuses on practices that allow developers to frequently merge code changes into a central repository, which does incorporate automation but is more about the overall process rather than a singular action like a Pull Request. Version Control is the system that allows tracking changes to code over time, serving as the backbone for many automated actions but not an automation action itself. Manual Review, on the other hand, inherently involves human judgment and is not automated, as it requires individuals to assess and approve code before it is integrated.