Answer:
Hallucination
It is a sound, image, or smell that seems legitimate but isn't really real.
There are a lot of causes why a person hallucinates, it maybe because of a drug or mental disorder.
I think it's A, but I'm not 100% sure
Stress can affect your endocrine system in regards to increasing chances of dysfunction with abnormal hormone or insulin production. Hormones are the chemical controls of your body and due to the stresses the rates of hormones overall are changed. This can become chronic changes, that affect your body.
The layer that encloses and protects the heart is
Pericardium
It is 4 whole and 3/8 and 3 wholes and 1/2