Explanation:

- Pierre Laplace (Option 3): He revised the nebular hypothesis in 1796. This theory suggests that the solar system formed from a cloud of gas and dust, called a nebula. His work built on earlier ideas by Immanuel Kant.

- Neville Chamberlain (Option 1): Not relevant here. He was a British Prime Minister known for his policy of appeasement before WWII.

- Edwin Hubble (Option 2): He was an astronomer known for proving that there are galaxies beyond the Milky Way and for Hubble's Law related to the universe's expansion.

- Harold Jeffrey (Option 4): He was a British mathematician and geophysicist, not associated with the nebular hypothesis.