Which of the following chemicals is considered moderately toxic to honeybees?

Chlordane is considered moderately toxic to honeybees due to its chemical properties and the way it interacts with bees in their environment. Chlordane, a persistent organochlorine insecticide, affects the nervous system of bees, leading to impairment and potential mortality upon exposure. Its moderate toxicity classification implies that while it is harmful, it may not be as acutely lethal compared to other highly toxic chemicals.

In contrast, the other options include substances that may either be more toxic or have different risk profiles regarding honeybee health. Methamidophos and acephate are both classified as highly toxic to bees; therefore, their impact is more severe. Carbaryl can also be toxic to bees, but its toxicity level can vary depending on the formulation and environmental conditions. Understanding the specific toxicity levels of these chemicals helps in making better decisions around their use, especially considering the critical role bees play in pollination and ecological balance.