Which of the following defines a minor's responsibility under compulsory school attendance?

A minor's responsibility under compulsory school attendance is defined by the requirement that they must attend school unless they have a valid excuse. This definition is rooted in the laws governing education, which aim to ensure that all minors receive an education and limiting absenteeism to cases where there are legitimate reasons for not attending. Valid excuses can include illness, family emergencies, or other situations recognized by the education authorities.

The focus on valid excuses emphasizes the importance of the education system while still respecting individual circumstances that may prevent attendance. This definition directly supports the intention of compulsory education laws, which seek not only to minimize unexcused absences but also to provide flexibility for legitimate situations that might arise.