Answer:
A longitudinal study
Explanation:
A longitudinal study can be used to discover relationships between variables that are not related to various background variables. This observational research technique involves studying the same group of individuals over an extended period.
its c hope this helps
Its not A and i know that because I already put that answer
ovulation
glands
eggs
grows
2
fetus
hormones
30
grow
bloody
blood
Internal- genetic factors, addictive tendencies, the need to feel pleasure
External - celebrity role models and perception of drug use as a norm
B. Sleep Habits