<span>Though Jean Piaget, a clinical psychologist, believed cognitive development as resulting from individual discovery, Lev Vygotsky felt it was connected to the social activities guided by or encouraged by others. Vygotsky was a psychologist who resided in the Soviet Union. Developmental psychology was his specialty.</span>
The teacher gives a link so you can watch the video again. I know of Jared Diamond from his books. I have not seen this video before & would need to watch it too in order to help you.
Answer:
Oxytocin
Explanation:
Oxytocin stimulate(s) uterine contractions, cause(s) the breasts to "let down" milk, induce(s) a relaxed mood, and promote(s) responsiveness to the baby.
Oxytocin is a hormone secreted by the posterior pituitary gland and its two major functions are; the contraction of the womb (uterus) during childbirth and lactation (milk secretion/let down.