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land
Natural resources used to produce goods and services, such as farmland, water, oil and forests.
Labour
The human effort used in production, both physical and mental. For example, factory workers and teachers.
Capital
Human-made resources used to produce goods and services, such as machinery, tools and factory buildings. In this context, capital does not simply mean money.
Enterprise
The ability to organise the other factors of production, take risks and run a business. The person who does this is an entrepreneur.