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.