Question

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Explanation:

Identify the core concept

The question asks to classify physical systems like roads, railways, sewage, and the electrical grid. These are foundational physical structures and facilities needed for the operation of a society or enterprise.

Evaluate the options

• infrastructure: This term refers directly to the basic physical and organizational structures (e.g., buildings, roads, power supplies) needed for the operation of a society.
• private goods: These are excludable and rivalrous goods provided by private markets, which does not fit public systems like roads and sewage.
• entitlements: These are government programs guaranteeing access to some benefit by members of a specific group (e.g., Social Security).
• social capital: This refers to the networks of relationships among people who live and work in a particular society, enabling that society to function effectively.

Select the correct option

The physical systems listed are classic examples of public infrastructure.

Answer:

• infrastructure (Correct answer)
• private goods
• entitlements
• social capital