Which of the following is a dimension of service quality?

Responsiveness is a vital dimension of service quality, as it reflects an organization's ability to promptly address customer needs and inquiries. It involves how quickly and effectively a service team responds to customer requests, questions, or issues. High levels of responsiveness typically contribute to customer satisfaction and loyalty, as clients appreciate being acknowledged and having their concerns addressed in a timely manner.

The other options, such as promotion, location, and income, while potentially relevant to overall business operations or marketing strategies, do not specifically relate to the quality of the service being provided. Promotion refers to marketing efforts to attract customers, location pertains to the physical placement of a business, and income relates to financial aspects rather than how a service is delivered or experienced. Therefore, responsiveness stands out as a clear dimension of service quality, essential for building strong customer relationships and ensuring service excellence.