Question

what is one piece of evidence that helps scientists explain how the solar system formed?

Explanation:

One piece of evidence is the presence of the asteroid belt between Mars and Jupiter. It is thought to be remnants of material that could not form a planet due to Jupiter's strong gravitational pull, supporting the nebular hypothesis which states that the solar - system formed from a rotating cloud of gas and dust.

Answer:

The presence of the asteroid belt between Mars and Jupiter.