Which option in Windows allows you to add features like OpenSSH Server?

The ability to add features like OpenSSH Server in Windows is found within the "Manage installed applications" area, specifically through the "Optional Features" section. This section allows users to enable or install additional features that are not included by default in the Windows installation.

When you navigate to "Manage installed applications" and look for "Optional Features," you can directly add new functionalities to enhance system capabilities, including tools like OpenSSH which is essential for various network operations, especially in server management and remote access scenarios.

The other options do not facilitate adding new features. Personalization tools generally focus on user interface customization, Administrative tools provide access to system administration utilities, and Update and security settings are primarily concerned with system updates and security configurations rather than adding new features. This makes "Manage installed applications" the correct choice for modifying system features.