Explanation:

- Land: This is a primary factor of production. It includes natural resources like minerals, water, and soil that are used in creating goods and services.

- Labour: Another vital factor, labour involves the human effort, both physical and intellectual, used in the production process.

- Expenditure: This is not one of the four main factors of production. It refers to the money spent on goods and services, not a factor itself.

- Entrepreneurship: This is the drive to develop new ideas and businesses, bringing together the other factors. It is crucial in generating economic growth.