Some products are produced most efficiently when there is a single supplier. what is this called?

natural monopoly

natural resources

price controls

wage controls

The correct option is A. Natural monopoly is defined as exclusive control of a supply or a business as a result of high start upcosts required to operate the business in a particular industry. Natural monopoly may also occur as a result of special laws, materials, technology, etc that are required to operate in the industry. Products from this type of company can be produce most efficiently as a result of economies of scale.

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The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.