In which of the following economic system is the consumer referred to as the king?

In a capitalist economy, the consumer is often referred to as the king. This is because in a capitalist system, businesses operate in a competitive environment where they must cater to the needs and wants of consumers in order to succeed. Consumers have the power to make choices about what goods and services they purchase, and businesses must respond to those choices by producing products that meet their demands. The satisfaction of consumers is therefore essential to the success of businesses in a capitalist economy.