Which relationship between Earth and the Sun explains the changing of the seasons during a year? A
During a year, the Sun expands to cause summer, and then contracts to cause winter.

B
The tilt of Earth's axis causes changes in the angle of the Sun's rays during a year.

C
As Earth travels closer to the Sun, summer occurs, and as it gets further away, winter occurs.

D
Yearly increases in solar activity cause summer, and decreases in solar activity cause winter.

This is kenetic energy.

stands for electromotive force and it is measured in volts. despite its name, it is not actually the force in the sense of being a "pushing" or "pulling" (not measured in newtons).an equation that relates emf,  ℰ,  to a battery's terminal voltage, v, current, i, and internal resistance, r, is    ℰ = v + irin this case, the emf can be interpreted as a voltage—a difference in electric potential.i would not say that it would be considered an energy. if emf can be defined as the energy/work per a unit charge from a battery or other electric source, then it is not strictly energy.