Fact 1: Gravity pulls objects towards planets. Fact 2: An object's weight is the force of gravity on that object. Given the two facts above, what about an object can cause objects to be pulled towards planets?

Available options:
(A). phase;
(B). structure;
(C). Energy.;
(D). means;
(E). wind;
(F). energy;
(G). weight;
(H). sunlight;
The answer is:
(G).