Which of the following describes the main focus of physical security controls?

The main focus of physical security controls is to protect physical assets and environments. This includes safeguarding buildings, hardware, and other tangible aspects of an organization's infrastructure from various threats such as theft, vandalism, and natural disasters. Physical security measures can include locks, guards, surveillance cameras, and access control systems that help create a secure perimeter around sensitive areas.

While preventing unauthorized data access, ensuring software integrity, and enabling secure software development processes are all important elements of information security, they primarily pertain to digital or virtual realms, rather than the physical realm that is the central concern of physical security controls. This distinction highlights why protecting physical assets and environments is the most accurate description of the focus of physical security controls.