Which of the following behaviors would be interpreted as aggressive signs in animals?

The interpretation of aggressive signs in animals is crucial for ensuring safety and understanding their behavior. Snarling or biting are clear indicators of aggression in an animal's body language. When a dog snarls, it displays its teeth as a warning sign, indicating discomfort, fear, or an intention to defend itself. Biting is a more extreme behavior that suggests the animal feels threatened or provoked, and this behavior often results from a build-up of stress or fear. Recognizing these signs helps caregivers take appropriate actions to prevent escalation and keep both the animal and the people around it safe.

In contrast, the other options may not indicate aggression. Tail wagging, for example, can signify excitement or happiness, though it can also indicate nervousness in some contexts, whereas barking can reflect a variety of emotions such as excitement, alertness, or a call for attention. Rolling over typically indicates submission or a desire for play rather than aggression, as it often represents trust in the animal. Understanding these nuances helps individuals accurately assess animal behavior and respond appropriately.