Answer:
The infant monkeys behavior is the correct answer.
Explanation:
Harry Harlow was an American psychologist known by his experiments with monkeys, as in the question.
A dependent variable refers to what is measured or studied during an experiment, and it responds to the independent variable, which is the factor controlled by the person in charge of the experiment. In this case, the independent variable refers to the mothers and the amount of stress of the monkeys, while the dependent variable refers to how the monkeys reacted to these conditions.