Answer:
D the others are highly pollutant expesially nuclear and natural gas
Explanation:
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.
The answer is False
Hope this help :)
Um..... because it could have high levels of mercury, an mercury consumed during pregnancy has been linked to developmental delays and brain damage
