The ethological approach implies: a) a careful description and classification of infant and child behaviour; 4 b) reference to a posited environment of
evolutionary adaptedness for humans, as evidenced by young humans» intense responsiveness to being left alone in a strange environment with strange people; and c) analyzing the function of emotions and behaviours in a social context.5 Attachment serves to ensure protection and care, and secure attachment serves to relieve distress, restore physiological homeostasis and encourage exploration.