What is the definition of behavior in animals?

The definition of behavior in animals is best captured by the idea of an externally visible and internally coordinated pattern of activity. This definition emphasizes that behavior encompasses a wide range of actions that can be observed, such as movement, vocalizations, and social interactions. It highlights the coordination of both internal biological processes, such as hormonal or neurological activity, and external expressions of those processes.

Behavior is not just a straightforward reaction but involves complex patterns that may be influenced by various factors, including genetics, environment, and social context. This comprehensive view allows for a deeper understanding of how animals interact with their surroundings and with each other, as behaviors are often strategies that animals employ to survive and reproduce in their specific environments.

In contrast, the other options do not convey the full breadth of what constitutes behavior. While responses to environmental stimuli are a component of behavior, they do not encompass the integrated and complex nature of how these actions are coordinated within the animal. The notion of complex interactions between species pertains more to ecological relationships rather than the internal mechanisms of behavior. Lastly, learning from experience is indeed a crucial aspect of behavior but it represents just one facet of the broader concept of behavior itself.