I think the answer to this question is mountains
Answer:
C)caffeine is the independent variable
Explanation:
Caffeine is the independent variable and word recall is the dependent variable. Word recall is dependent on the presence or absence of caffeine.
Explanation:
From the widespread observation that children in the same families are usually very different, the presence of their individual genes and non-shared interactions counts.This why despite growing up in the same home environment, Karen and her brother John have personalities as different from each other