Answer:
constitution is important because it ensures that those who make decisions on behalf of the public fairly represent public opinion. It also sets out the ways in which those who exercise power may be held accountable to the people they serve.
The importance of cephalization is the development of a control center or brain. The brain is a concentration of nervous tissue that coordinates and controls sensory information and nervous activity. A larger brain allows for smarter and more complex animals.
The answer is D because answers A, B, and C are simply spreading American culture throughout America, thats not cultural diffusion by any means.
The answer is the critical period. Destructive substances, for example, medications or radiation that attack the womb and result in birth abandons are called teratogens. Teratogens are particularly harming in the embryonic stage since it is a critical period in pre-birth advancement.