Which service involves planning and promoting travel-related activities?

The correct answer focuses on the specialized field of travel and tourism marketing, which specifically deals with the planning and promotion of activities related to travel. This service encompasses a range of functions, including advertising travel destinations, organizing travel packages, and coordinating events that cater to travelers' interests.

Travel and tourism marketing is dedicated to attracting tourists and travelers by highlighting destinations, experiences, accommodations, and activities that appeal to different demographics. This involves not only marketing strategies but also an understanding of consumer behavior and preferences within the travel industry.

In contrast, the other options relate to different sectors. For example, sports and entertainment marketing focuses on promoting events and athletes, hospitality services pertain to customer service in lodging and dining, and business services marketing deals with promoting services that support businesses in various capacities. While these fields may involve some aspects of travel, they do not specifically focus on travel-related activities in the same way that travel and tourism marketing does.