LSD is structurally similar to the neurotransmitter

a. dopamine.
b. glutamate.
c. serotonin

If you find a correlation between school grades and school attendance, you can conclude that:

A. high attendance and high grades tend to occur together. B. high attendance causes high grades. C. smart children often miss school. D. smart children enjoy school.

________, the pleasure of being touched and held, is important throughout life

a. Socialization b. Contact comfort c. Synchrony d. Maturation