Which of the following best defines 'capital' in economics?

The definition of 'capital' in economics primarily refers to the physical tools, machinery, and equipment that are utilized in the production of goods and services. This includes items like factories, tools, and machinery that enhance the production process. Capital is considered a critical factor of production, as it enables businesses to increase efficiency and produce more output.

While financial assets are important for starting and running a business, they are not classified as capital in the economic sense. Instead, they are considered financial resources. Similarly, natural resources, such as land and raw materials, represent a different factor of production. Lastly, the workforce employed in a business falls under the category of labor, which is yet another distinct factor of production. Thus, the correct understanding of capital uniquely identifies it with the physical tools and equipment essential for the production process.