What defines a school bus?

A school bus is specifically defined as a vehicle used to transport students for educational purposes. This designation is important because it emphasizes the primary role of the vehicle in facilitating the movement of children to and from school, as well as to school-related activities. School buses are subject to various safety regulations and operational standards to ensure the safety of passengers, including distinctive coloring, signage, and specific lighting that identifies them as a school bus.

The other options do not accurately describe a school bus. The first option references personal transport, which does not pertain to the purpose of a school bus. The third option mentions a speed limitation, which is irrelevant to the actual definition of a school bus. Lastly, the fourth option focuses on sports activities, which falls outside the primary function of transporting students for education. Therefore, the correct answer clearly aligns with the recognized and regulatory understanding of what qualifies as a school bus.