Which two systems are interacting based on the diagram? Select one:
A. Muscular and Integumentary

B. Nervous and Immune

C.Endocrine and circulatory

D.Exreory and circulatory

Independent variable: type of shoe

Dependent Variable: running speed

TWO controlled variables: same running distance, same runner

Control Group: running with the regular Nike shoes

Experimental Group: running with the new Nikespeed shoes.

Explanation:

According to this question, Molly wants to test her new NikeSpeed running shoes that claim to make her run faster than her regular Nike shoes.

- Independent variable is the variable of an experiment that is subjected to change or manipulation by the experimenter. In this experiment, the independent variable is the SHOES that Molly wants to test.

- Dependent variable is the measured variable that responds to the change made to the independent variable. In this case, the dependent variable is the RUNNING SPEED.

- Control variable is the variable that must be kept unchanged throughout the experiment in order not to change the experiment outcome. The control variables include; SAME RUNNING DISTANCE, SAME RUNNER (MOLLY) etc.

- Control group is the group of an experiment that does not receive the experimental treatment. In this case, it is RUNNING WITH THE REGULAR NIKE SHOES.

- Experimental group is the group that receives the experimental treatment. In this case, it is RUNNING WITH THE NEW NIKE-SPEED SHOES.