Ann, a user, wants to remove unnecessary software and services from her personal computer to make it more secure. This is an example of:

Baselining is the process of establishing a known, secure configuration against which future changes or deviations can be measured, not the act of removing components.

Hardening refers to the process of securing a system by reducing its attack surface, which often involves disabling or removing non-essential services, applications, and features. This minimizes potential vulnerabilities that attackers could exploit, thereby increasing the system's overall security.

Patching involves applying fixes to software to correct bugs or security vulnerabilities, rather than removing unnecessary components.

Updating refers to installing newer versions of software or operating systems, which may include new features or security improvements but isn't solely about removing components to reduce the attack surface.