Why must programs also be protected in an operating system?

Programs within an operating system can significantly influence overall system security, making their protection paramount. Some programs, particularly those with elevated privileges or those that interact with sensitive data, can become vectors for security vulnerabilities. Malicious actors can exploit weaknesses in these programs to gain unauthorized access, disrupt services, or compromise sensitive information.

By securing programs, an operating system can mitigate risks such as unauthorized code execution, data breaches, or resource hijacking. This protective measure helps ensure that programs function as intended without exposing system resources or user data to potential threats. Additionally, the integrity and confidentiality of the system are maintained, bolstering the overall resilience of the operating system against attacks.

Assessing the context of the other choices: while consuming unnecessary resources is a consideration, it doesn't directly impact security in the same way. Accessibility to users highlights usability rather than security concerns. The requirement for program updates is relevant to maintaining security but is not a fundamental reason for protecting programs at their core.