Why is Pluto now called a dwarf planet?

It has not cleared the neighborhood around its orbit, pluto is considered a dwarf planet. It orbits in a disk - like zone beyond the orbit or neptune called the kuiper belt, a distant region populated with frozen bodies left over from the solar systems functions

pluto follows the first two rules: It is round, and it orbits the sun. It does not, follow the third rule. It has not yet cleared the neighborhood of its orbit in space. Because it does not follow this rule, Pluto is no longer consider a planet It has a new title "dwarf planet." Dwarf planets are celestial bodies that only meet the first two criteria in the new definition of a planet.