Which of the following actions incurs a $100 fine?

The correct answer is based on the legal regulations established for safe driving practices and environmental protection. In Puerto Rico, there are specific laws that impose penalties for not adhering to safety measures for children in vehicles. Failing to secure a child under 12 in the back seat directly correlates to child safety laws, which are designed to protect young passengers and prevent injury during an accident.

Additionally, littering on the road is not only a violation of public cleanliness and safety but also a breach of environmental laws. The $100 fine serves as a deterrent to encourage individuals to maintain cleanliness and respect for the environment.

Both of these actions—failing to properly secure a child and littering—reflect important public safety concerns. Thus, the imposition of the $100 fine for either action underlines the importance of compliance with these regulations in order to promote safety and environmental responsibility.