Put the celestial bodies in order from earliest to latest.

Planetesimals, protoplanets, planets

Dwarf planets, planets, protoplanets

Planets, protoplanets, planetesimals

Protoplanets, dwarf planets, planetesimals

The answer is : Planetesimals, protoplanets, planets. This is the order of the celestial body from earliest to latest. A protoplanet is a massive object that will eventually become a planet. They are at first formed by the accumulation of planetesimals into protoplanets, then into planets.