What approach enhances the resilience of a system through redundant components?

The correct choice is comprehensive because it recognizes that multiple strategies contribute to enhancing the resilience of a system through redundancy.

Fault tolerance refers to a system's ability to continue operating in the event of a failure of one or more of its components. This is achieved by incorporating redundant components that can take over when a primary component fails, ensuring uninterrupted service.

High availability focuses on ensuring a system is consistently operational and available for use, often achieved by integrating redundancy and failover mechanisms. It aims for minimal downtime, making systems more resilient by allowing automatic switching to backup systems in case of a failure.

Redundant hardware specifically addresses the physical components of a system that are duplicated to prevent failure. It provides a direct method to address potential points of failure, thereby increasing the system's overall resilience.

Collectively, these approaches contribute to a robust system design that is capable of maintaining functionality despite hardware or software failures. Thus, selecting "All of the Above" encapsulates the essence of the question, as it highlights all relevant methodologies that enhance system resilience through redundancy.