How is a school bus defined?

A school bus is defined as every motor vehicle used for transporting children. This definition encompasses a broad range of vehicles specifically intended to safely transport students to and from school and related activities. The emphasis on transporting children highlights the bus's purpose, which includes adherence to specific safety regulations, signage, and requirements that distinguish it from other types of vehicles.

While the definition of a school bus could potentially overlap with the other choices, they misrepresent the comprehensive role of a school bus. For example, the option regarding vehicles that carry more than 10 passengers does not consider the specific focus on children, nor does it address the regulatory framework that governs school buses. Similarly, limiting the definition to vehicles operated by school districts ignores the reality that various private entities may also operate school buses under certain conditions. Lastly, a definition centered on transporting adults diverges from the primary purpose of school buses, which is to serve children. Hence, the correct answer accurately reflects the intended usage and regulatory framework surrounding school buses.