"Security Kernel" is the correct answer for the above question.
Explanation:
Security Kernel is a part of the kernel which is present in the operating system. The work of kernel is to manage the resource, boot the operating system and the other work.
The security kernel is used to secure or control the access of the software and the hardware from the other source and the user which can access the computer for the wrong purpose.
The above question asked about the central part of the operating system which is used to control access. This part is known as "Security Kernal".
