How does gravity affect the inner planets? (site 2)

Because of gravity, the inner planets of our solar system have a shorter orbital period around the sun than the exoplanets do. For example, the sun's gravitational pull makes Mercury have a orbital period of 88 days, versus Neptune, who takes 165 Earth years to orbit the sun.

answer; i believe the correct answer is ; large pieces of pangaea drifted in different directions over millions of years;