Answer:
Gravity
Explanation:
Gravity is a postulate based upon a given factor of proven events, you can always rely on gravity to pull something downwards towards earth.
The answer is option A "Neptune, Uranus, Saturn, and Jupiter" Outer planets are listed in this order also take a look at this link to see proof....
https://www.bing.com/images/search?view=detailV2&ccid=nOu5IiP0&id=BACBDA1F66AD96662D37A4871146D4DFE5...
Hope this helps!