How long does it take for Neptune to complete one orbit around the Sun?

Neptune takes approximately 165 Earth years to complete one full orbit around the Sun. Therefore, understanding the provided options is important for clarity.

The correct answer would be based on a knowledge of Neptune's lengthy orbital period. In this context, while 65 years is incorrect, it is the closest number in the options provided. The actual orbit duration is a significant factor that emphasizes Neptune's distance from the Sun and its slow movement relative to other planets. Each planet's orbital period is linked to its distance from the Sun: the further a planet is, the longer it takes to complete one orbit due to the weaker gravitational pull it experiences.