The statement that best compares the composition, size, and density of Neptune to Earth is: B. Neptune is larger, more gaseous, and less dense.
What is the size of Neptune compared to that of Earth?
Neptune is significantly larger than Earth, primarily composed of gases like hydrogen and helium, and it has a lower average density due to its composition and lower overall mass.
This contrasts with Earth, which has a more solid composition and higher density, largely attributed to its rocky structure and heavier elements.
The answer is: B.