Concept:The closer a planet is to the Sun, the shorter its orbital period.
Explanation:Mercury is the innermost planet in our solar system.
It lies closest to the Sun among all the planets.
Planets nearer to the Sun follow shorter orbital paths.
They also travel faster because of greater gravitational attraction.
As a result, they complete one revolution in less time.
Mercury takes about
88 Earth days to orbit the Sun once.
Mars takes about
687 Earth days to complete its orbit.
Jupiter takes about
11.86 Earth years for a single revolution.
Pluto takes about
248 Earth years to go around the Sun.
Thus, Mercury has the shortest orbital period of all.
Answer:C. Mercury