Answer:
The answer should be AGE 7
Explanation:
At age 4 Children starts to understand death's entirety. Study reveals that at about age 3, 10 percent of children understand finality against 58 percent of 4-year-olds. As time goes on the remaining two facets of death are learned as time goes on at the age 7.
A. there is a change in Genetic frequency
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.
