15. Nadia wrote the following sentence in her report on Pluto: "Pluto is a dwarf planet because it has a spherical shape and an orbit around the Sun that is clear of other objects." Which of the following is a correction that needs to be
made?
A. Pluto is actually a small solar system body.
B. Pluto's orbit is not clear of other objects,
C. Pluto is actually a planet.
D. Pluto has a potato-like shape.

B. Pluto's orbit is not clear of other objects

Explanation:

Pluto is a dwarf planet and considered as ninth planet of the solar system.

A large body whose orbit do not clear the neighbourhood is classified as a dwarf planet. The gravity of Neptune limit the orbit of Pluto and shares its orbital neighbourhood with many Kuiper belt objects.

Hence, the correct answer is "B. Pluto's orbit is not clear of other objects".