Question

why pluto is a dwarf planet? or what is dwarf planet? it's very important

Answer 1

Why is Pluto known as a dwarf planet?

Because it has not cleared the neighborhood around its orbit, Plutois considered a dwarf planet. It orbits in a disc-like zone beyond the orbit of Neptune called the Kuiper belt, a distant region populated with frozen bodies left over from the solar system's formation.
A dwarf planet is a planetary-mass object that is neither a planet nor a natural satellite.

Answer 2

Why pluto is a dwarf planet?

Pluto (minor planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of bodies beyond Neptune. It was the first Kuiper belt object to be discovered. Pluto was discovered by Clyde Tombaugh in 1930 and was originally considered to be the ninth planet from the Sun.

what is dwarf planet?

a celestial body resembling a small planet but lacking certain technical criteria that are required for it to be classed as such.