Explanation:

- Option 1: Harold Jeffreys is not associated with the steady state theory of the universe. He was a British mathematician and geophysicist known for his work in statistical science and earthquake research.

- Option 2: Edwin Hubble is known for discovering the expansion of the universe, key to the Big Bang theory, but not the steady state theory.

- Option 3: Fred Hoyle is indeed the scientist who proposed the steady state theory. He suggested the universe is eternal and unchanging on a large scale despite its expansion, contradicting the Big Bang theory.

- Option 4: Pierre-Simon Laplace was a French mathematician and astronomer who did groundbreaking work in celestial mechanics, but not the steady state universe.