Which of the following best describes restricted-use pesticides?

Restricted-use pesticides are substances that can pose a higher risk to the environment or human health if not used correctly. Because of this increased risk, their use is strictly regulated. The correct characterization of restricted-use pesticides is that they are only available to licensed applicators. This requirement ensures that only individuals who have received specific training and have demonstrated knowledge about the safe and effective use of these products can purchase and apply them.

Licensing for applicators typically involves comprehensive education about the safe handling, application techniques, regulatory compliance, and any potential hazards associated with these pesticides. This prevents misuse and minimizes the risks to the general public, non-target species, and the environment.

The other choices fall short because restricted-use pesticides are not safe for general public use, meaning they are not intended for use without supervision or professional approval. They are not inherently considered eco-friendly, as their designation as "restricted-use" suggests they may have adverse environmental impacts. Additionally, they are not limited to non-commercial purposes; licensed applicators may use them in various contexts, including agricultural business settings.