What is the violation if a driver discards a paper sack out of the car window onto the highway?

The act of discarding a paper sack out of the car window onto the highway is categorized under littering. Littering refers specifically to the unlawful disposal of waste materials in public places, which includes roadsides, parks, and other outdoor areas where such refuse can lead to unsightly conditions and environmental harm. This behavior not only violates local cleanliness regulations but also poses potential hazards to wildlife and contributes to general pollution.

In contrast, illegal dumping typically involves larger quantities of waste or specific types of refuse, such as construction debris or hazardous materials, and often occurs in more remote or unauthorized sites rather than merely out of a vehicle window. Reckless endangerment pertains to actions that pose a substantial risk of serious physical injury to others, while public disturbance involves activities that disrupt the peace in public areas. Discarding a small paper item falls squarely within the scope of littering, making it the most accurate choice in this scenario.