Final answer:
The department responsible for selling goods or services in a company is the Sales department, which is focused on generating revenue by closing deals with customers.
Step-by-step explanation:
The department within a company that performs the function of selling goods or services is called Sales. The Sales department is responsible for building customer relationships and closing deals to generate revenue. This department is distinctly different from others, such as Marketing which focuses on market research and promotion, Finance which manages the company's money, and Operations Management which oversees the production of goods or services.