Which immunoglobulin class, found in blood, lymph, and the intestine, can cross the placenta and to protect a fetus?

The answer is IgG  its a type of immunoglobulin

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.

Ibelieve this is a true statement. i hope this ! : -)