How do the muscular, circulatory, and excretory system work together during exercise?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.

Which of the following statements correctly describes a transformer?