Question

which is not part of the definition of a dwarf planet?
○ spherical in shape
○ composed of rock and ice
○ not a satellite
○ has not cleared debris from its orbit

Explanation:

According to the International Astronomical Union (IAU) definition of a dwarf planet: A dwarf planet is a celestial body that is in orbit around the Sun, is spherical in shape (hydrostatic equilibrium), has not cleared the neighborhood around its orbit, and is not a satellite. The composition (rock and ice) is not part of the formal IAU definition.

Answer:

composed of rock and ice