What type of deployment involves searching for matching environment variable keys?

The correct answer to the question is Git Deployment, as this type of deployment utilizes the capabilities of Git to manage and track changes in code. When performing a Git Deployment, the process often includes identifying and matching environment variable keys that can differ between development, testing, and production environments. This is essential to ensure that the deployment operates smoothly across various environments, as different configurations may require specific environment variables to function correctly.

Git Deployment supports the consistency and portability of applications by enabling continuous integration and deployment practices. By leveraging environment variable keys, it ensures that the code is adaptable to the environment in which it is being deployed, thus reducing errors and improving efficiency during the deployment phases.

The other deployment types are less focused on managing environment variables. Metadata Deployment, for example, involves deploying specific components and not necessarily the environment configurations that are linked to those components. Custom Setting Deployment may deal with specific application settings without the broader context of managing variables across environments. Built-in Deployment might refer to default mechanisms provided by the platform, which may not explicitly tackle the association of environment variable keys as part of the deployment process.