Which behavior is considered a clear violation leading to demerit points?

Driving without a valid license is a clear violation that directly jeopardizes public safety and undermines the legal framework governing road use. In Ontario, the law stipulates that all drivers must have a valid and appropriate license for the vehicle they are operating. Failing to comply with this regulation not only indicates a lack of the necessary training and knowledge to operate a vehicle safely but also poses a risk to other road users. Consequently, engaging in this behavior results in demerit points being assigned, as it reflects a serious infraction of traffic laws.

The other behaviors, such as listening to music while driving, using a navigation system, or wearing a seatbelt, do not inherently violate traffic laws in Ontario. Listening to music may be a distraction but is not illegal unless it affects driving capabilities. Navigating with a system is commonly accepted if used responsibly, and wearing a seatbelt is mandated by law rather than a violation.