Labour is all the workers who are available in a country to help produce goods and services, such as builders, factory workers and food scientists. Different workers have different skills, qualifications and experience.
The economic return for labour is wages.
Capital
Capital is all the human-made resources that are available in a country to help produce goods and services, such as equipment, machines and buildings.
The economic return on capital is interest.
Enterprise
Enterprise is the act of the person or business that brings together the land, labour and capital to produce goods and services.
The hoped-for economic return for enterprise is profit.