Which of the following describes an antidote?

An antidote is specifically defined as a treatment that counteracts the effects of poisoning. It works to neutralize, inhibit, or reverse the harmful effects of a toxic substance. This definition aligns precisely with option B, emphasizing the function of antidotes in medical and toxicological contexts.

The other choices relate to different aspects of toxicology or pest management but do not accurately capture the essence of what an antidote is. For instance, inducing vomiting is a method to expel toxins but is not considered an antidote itself—it’s more of a supportive action in cases of some types of poisoning. Preventive measures against pest infestations do not relate to antidotes at all, as they deal with avoiding problems rather than addressing them after they occur. Lastly, enhancing the potency of pesticides also diverges from the concept of an antidote, as this action does not involve counteracting poison but rather increasing the effectiveness of a chemical. Therefore, option B is the clear choice that correctly describes the function of an antidote.