A business plan is a written description of yourbusiness's future, a document that tells what you planto do and how you plan to do it.
In finance and accounting, capital generally refers to financial wealth, especially that used to start or maintain a business. In classical economics, capital is one of the four factors of production. The others are land, labor and organization.
Demand is an economic principle referring to a consumer's desire and willingness to pay a price for a specific good or service. Holding all other factors constant, an increase in the price of a good or service will decrease demand, and vice versa.