Land includes natural resources like minerals, oil, coal, the sea, and fish. It is best defined as the free gifts of nature. Labor is the most important resource for developed countries and includes the skills and quantity of workers available. The UK experiences shortages of skilled and manual laborers. Capital refers to money invested in a business and turned into productive goods like machinery, buildings, vehicles, and computers used in the business. Entrepreneurship is the ability to combine the factors of production and use them to profitably provide goods or services. All products and services require a combination of the four factors, though the specific mix depends on the good or service.