Which type of behavior is instinctual and present from birth?

Inborn behavior is instinctual and present from birth, as it refers to actions that organisms are naturally predisposed to perform without prior experience or learning. These behaviors are typically hardwired into an organism’s biology and can include various reflexes or innate responses to stimuli that are essential for survival. For instance, many animals exhibit certain instinctual behaviors such as breastfeeding in mammals or imprinting in birds, which do not require any learning or conditioning.

Conditioned behavior requires past experiences and is often the result of an association made through experience, while learned behavior develops through interaction with the environment and is not innate. Reflexive behavior, although automatic and occurring without conscious thought, isn’t always innate; it may develop in response to specific stimuli. Therefore, inborn behavior captures the essence of instinctive actions that are inherent and present at birth, making it the most fitting choice in this context.