What does the term crowning mean? What is the "normal" birth position of a fetus (what part of the body is delivered first)? Why is this position easier to birth a child?

The answer to this is true

Behavioral science is the study of human behaviors and how they can be influenced.  by examining patterns in behavior as well as reactions, individuals with behavioral problems can be more adequately treated, resulting in greater mental health of our society/the public.

Answercerebrospinal fluid;

Because it spreads quickly