The bill of right if am wrong I am so so sorry.
Answer:
When the moon is full, it is on the opposite side of the Earth from the sun.
Explanation:
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Albert, a student researcher, varies the amount of food given to rats in an experiment to measure the effect on their learning behavior. In albert's study, the amount of food given is the independent variable.
An independent variable is under the control of the experimenter. Independent variable does not depend on the other variables involved in the experiment. Since the amount of food is varied, it is not depending on other variables like size of mice, weight, etc.
