Stars are formed from interstellar clouds because of

the Law of Entropy

the Law of Universal Gravitation

the Law of Stellar Evolution

the Law of Propulsion

The answer is D. Stars are formed from interstellar clouds because of the Law of Universal Gravitation. The interstellar clouds are termed as nebula. When other stars dies a supernova occurs then the gravity from this pushes matter into the clouds until it cannot overcome the gravitational pull and it collapses which heats matter up forming a star.