Which of the following acts constitutes an offense under the illegal dumping penalties?

Discarding lighted litter that ignites a fire constitutes an offense under the illegal dumping penalties due to the immediate hazard it poses to public safety and the environment. This act is particularly dangerous because it not only involves littering but additionally creates a fire risk, which can lead to severe consequences such as property damage, injury, and potential loss of life. The law is structured to deter such reckless behavior, thereby protecting the community and natural resources from the dangers associated with fires and improper disposal practices.

The other actions mentioned do not carry the same level of immediate threat. For instance, discarding non-lighted litter may be an offense, but it does not possess the same urgent danger as lighted litter that can start a fire. Similarly, dumping solid waste in a designated area is not an illegal act if done in compliance with local regulations, and improper disposal of household waste, while concerning, may not always fall under the stringent penalties associated with illegal dumping unless it involves specific violations outlined in illegal dumping statutes. Thus, the context and severity of the action play critical roles in determining the applicability of illegal dumping penalties.