Which of the following security controls focuses on ensuring policies are followed effectively?

Managerial control is focused on establishing and enforcing security policies and procedures within an organization. This type of control is primarily concerned with the governance aspects of security, including risk management, compliance, and the assurance that the organization's policies are communicated and adhered to by its employees.

It is the responsibility of managerial control to define the security framework, allocate resources, and ensure that all operational practices align with the established policies. This includes activities like training staff on security protocols and conducting audits to verify compliance.

In contrast, operational controls are more concerned with the day-to-day processes that directly manage the organization’s operations and might include specific procedures for security tasks. Technical controls involve the use of technology and software solutions to secure systems and data, such as firewalls or encryption. Physical controls pertain to protecting the physical assets of the organization, like securing buildings or equipment.

By emphasizing the role of managerial control in ensuring that security policies are effectively enforced, it becomes clear why this answer is the most appropriate choice in the context of the question.