Explain two similarities and two differences between Mesopotamia and Nile River Valley

What was the atlanta race riot of 1906 ?

Rick is a toddler with an easy temperament and active nature. people are often seen stopping to talk to him in supermarkets and parks where his mother takes him in the evenings because he smiles willingly at other children and adults. this aspect of rick’s behavior most likely reflects a(n) active genotype–environment interaction suppressive genotype-environment interaction passive genotype–environment interaction evocative genotype–environment interaction

Why is it necessary to obey social norms? write briefly.