Final answer:
Animal saliva can counteract plant anti-nutrients by neutralizing or detoxifying the toxins present in plants.
Step-by-step explanation:
Plants produce various chemicals to deter animals from consuming them, such as poisonous compounds and noxious smells. However, some animals have developed ways to counteract these plant defense mechanisms. For example, certain animals have saliva that can neutralize or detoxify the toxins in plants, allowing them to consume these plants without harm.