Professor polinski suggested that humans pair-bond because this practice encouraged the cooperative nurture and survival of children. the professor's suggestion best illustrates a( n) perspective.

I believe the answer is evolutionary perspective.
The evolutionary perspective refers to the view that all our behavior/psychological tendencies are based on our instinct for survival.
Another example evolutionary perspective would be baby who cries whenever near strangers happens as a form of defensive mechanism from threats.

Answer to 1st question: They dug irrigation systems and canals to get the water to their crops.

Answer to 2nd question: They knew how to boost the immune system and they knew how to get the body to produce more white-blood cells. They also had a 90% success rate on surgeries, including brain surgeries.

Answer to 3rd: He had a big army and long roads leading all over his empire so if there was an uprising his army could travel quickly.

Hope this helps, have a good day. c;