What is the primary use of a school bus according to the definitions?

The primary use of a school bus is to transport students to and from educational institutions. This definition highlights the specific role that school buses play within the educational system. They are designed with safety features and regulations tailored to ensure the protection of children during transit, making their main function distinctly different from that of other vehicles.

By focusing on student transport, this definition aligns with the essential purpose of school buses within the community, emphasizing their role in providing reliable and safe transportation for children, which is a critical aspect of educational access. Other options mention uses that are not aligned with the core function of a school bus, thus reinforcing the correctness of identifying student transportation as the primary use.