Scientists describe dopamine, norepinephrine, and phenylethyamine (PEA) as the brain's ____.
a. intimacy drivers
b. happiness controls
c. intimacy repressors
d. love chemicals
e. altruism markers
Question 2
Fruits and vegetables are the sole source of____.
a. glucose
b. probiotics
c. sterols
d. creatine
e. phytonutrients