For it, the attachment behavior mother-baby would have appeared to guarantee safe proximity between adult and baby and is provoked by the baby since its initial gestures. It is important to leave clearly that the affective entailing is not only the automatic result of the physiology, therefore we are biological cultural beings. The attachment guarantees the protection of the baby, but it is the interaction between mother and son whom the construction of the affective bond guarantees. Minute inquiries of the behavior of small children have disclosed the presence of natural adaptations for the social interaction and the formation of affective entailings. The attachment is closely on to the parental investment, and of it cannot be dissociado, therefore it is from the signals emitted for the baby and of the reply of parents it who if forms the bond.

If he cannot think one without the other. As shown in the example above, one notices that the baby acts on the adult and this answers the baby of a form that goes increasing the affective entailing for the constant answers, therefore, according to John Bowlby, psychiatrist and English psychoanalyst, cited for Pliny Landmark of Toni, one of the determinative factors for the sprouting and maintenance of the attachment behavior it is the rapidity with that the adult answers to the baby and the intensity of the interaction. The attachment behavior, beyond the protection function, propitiates to the baby a series of social interactions that collaborate for a healthful development of the child, beyond providing chances to it to train its social behaviors and to perceive the modifications of it in the way. Thus, he is thanks to this proximity mother-baby who this will have chances to see and to explore the world in a safe way, and thus to develop its brain, to learn with the others of its species and to feel part of it insurance in it from the love of its parents.