Amanic episode is
a. an overly joyful or excited state
b. an overly sad or somber state
c. an overly hopeless state
d. none of the above

The answer is letter D.  

None of the choices above exactly described what a manic episode is. It is not a disorder in and of itself but is a part of a type of bipolar disorder. Manic episodes usually last a period of one week where a person has an unusually irritable mood and is notably persistent in attaining goals presented to them. These episodes in mood disturbances are observable by others and can be compared to their usual state/behavior. If episodes occur very often they may impair overall functions of a person (e.g. work conditions, friendships, education). 

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.

Answer charlie should immediately start an exercise and diet program because all his test indicate that he is extremely obese;