An independent variable is a variable that is controlled in the experiment to test whether there will be an effect on the dependent variable. So in the experiment, the independent variable is the color of the feeder because Jamal wants to know if there is an effect if he uses red feeders on the hummingbirds. This is the one being controlled by Jamal because he can use a variety of colors of the feeders.
Answer:
helping on the plantation.
Explanation:
the south relied heavily on agriculture and needed workers.
women looked after the children and did the sewing
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I believe the answer is: Positive reinforcement
Positive reinforcement refers to a desired reward/stimulus that given to encourage an individual in doing a certain behavior.
In this case, music as something that jenny's crave and her craving is rewarded everytime she repeat the behavior of opening up the channel
