Small rocky bodies that are thought to be leftover remnants of the formation of the solar system are called asteroids.
Explanation:
1. Asteroids are small rocky bodies that orbit the Sun primarily found in the asteroid belt between Mars and Jupiter.
2. These rocky remnants are believed to be leftover materials from the early formation of the solar system.
3. Asteroids vary in size, shape, and composition, with some being as small as boulders while others are hundreds of kilometers across.
4. Studying asteroids can provide valuable insights into the early history and composition of our solar system.
In summary, the term that best completes the sentence is "asteroids" when referring to small rocky bodies that are remnants of the formation of the solar system.
