Which of the following is an example of a human resource?

The correct answer highlights that human resources refer to the capabilities, skills, and workforce that individuals provide for various tasks. In this context, 'Energy' can be interpreted as human energy or effort expended by people in performing work-related functions. This underscores the idea that human resources are not just the physical bodies present, but also the innate skills and the drive individuals bring to any endeavor.

The other options listed pertain to material or natural resources rather than human resources. Water is a crucial natural resource that supports life and yields essential benefits, but it does not involve the human component. Computers, while instrumental in modern work, are technological resources that enhance productivity, but they do not embody human attributes. Petrol is an energy resource derived from natural materials, necessary for fuel but again, it lacks the human dimension that is central in defining human resources. Thus, understanding the distinction between human resources and other types of resources is critical in resource management.