How were the planets in the solar system formed?

Question

A. The dust particles were attracted by gravity from distant galaxies.
B. The solid materials were forced out of the sun's disc and cooled down.
C. The gas particles released by the sun were pulled away and became solid.
D. The remaining materials from the sun's formation clumped together due to gravity.

Answer 1

The correct answer is:

D. The remaining materials from the sun's formation clumped together due to gravity.

This describes the process known as accretion, which occurred in the early solar system. After the sun formed from the gravitational collapse of a region within a large molecular cloud, the remaining gas and dust in the protoplanetary disk began to coalesce and clump together under gravity, leading to the formation of planets.