Question

which of the following best explains how observations of protoplanetary disks in other star systems support the theory that gravitational force helped form earth? (1 point)
the disks spin because of the wind in space, helping planets form.
the disks show particles clumping together due to gravity, forming larger bodies.
the disks show that stars heat up their surroundings to melt rocky planets.
the disks contain magnetic fields that attract small objects to each other.

Explanation:

Gravitational force causes particles to clump together. In protoplanetary disks, this clumping is observed as particles come together to form larger bodies, which is relevant to how Earth formed. The other options do not directly relate to gravitational - force - driven formation.

Answer:

The disks show particles clumping together due to gravity, forming larger bodies.