Which of the following is NOT an example of a sport facility?

The choice of an office building as not being an example of a sports facility is accurate because a sports facility specifically refers to a space designed for the purpose of conducting sporting events, practices, or activities related to sports.

Arenas and stadiums are clearly classified as sports facilities; they are built to host various sporting events and accommodate spectators. The YMCA, while it also serves as a community center and provides a range of recreational services, traditionally includes sports facilities such as gyms, swimming pools, and courts for basketball or similar sports.

In contrast, an office building is primarily designed for administrative or business activities and does not typically include the specialized infrastructure necessary for sporting events or physical activities. Thus, it stands apart from the other options, which are all inherently linked to sports and recreation.