Which of the following is not a marketing function?

The marketing function involves a set of activities that a company performs to promote the buying or selling of a product or service. Out of the given options, insurance is not a marketing function. Insurance is a financial product/service offered by companies to mitigate risks associated with events like accidents, theft, and natural calamities. Though insurance can be considered an important part of a business's overall risk management strategy, it is not directly related to the promotion or selling of a product/service, which is the main focus of marketing.