Which component is essential for the deployment of Salesforce B2C Commerce applications?

The correct choice is Deployment Manager, which is essential for the deployment of Salesforce B2C Commerce applications. Deployment Manager is a tool specifically designed to handle the transfer of code and configurations from development environments to staging and production environments. It streamlines the deployment process, ensuring that all necessary components, including code, configurations, and assets, are correctly moved to the target environment while minimizing errors and ensuring consistency.

This component is crucial for managing version control, tracking changes, and automating various deployment processes, which significantly enhances productivity and reduces manual effort. It is also integral to maintaining best practices in development workflows and ensuring that the application is up-to-date and functioning properly after each deployment.

While a web server, CDN (Content Delivery Network), and Git repository are important in their own right, they serve different purposes in the application's ecosystem. A web server hosts the application, a CDN improves content delivery speed, and a Git repository aids in version control and code management. However, none of these components perform the specific role of managing deployments like the Deployment Manager does. Therefore, for deploying Salesforce B2C Commerce applications, the Deployment Manager is a necessary and fundamental component.