Can gravity be proved?
"Can gravity be proved?"
Do you mean the force attracting two physical bodies to each other? Yes, that's easily demonstrated.
The theory of gravity is not about that commonplace phenomenon. It's much more complex than that. Sadly, I do not believe your background in the sciences is adequate to understand a brief explanation of it.
You can find much material on the theory of gravitation on the web, however, if you're of a mind to learn something.
Madame, it appears someone urinated in your breakfast cereal this morning.
We've been over this many times. There are "facts" -- things fall, populations of organisms change over time. The theories of science are proposed to explain those facts -- deformation of space-time, mutation and natural selection. Facts and theories are complementary. Theories are never "proved" because in the real world there is always a potential for falsification; however, theories are the highest order of scientific explanation in that they fit with the evidence and have been tested and retested by numerous researchers.
No. We can do experiments and gather lots of data that is consistent with the theory of gravity, and none that is inconsistent with it, but that doesn't prove it. There really could be angels pushing everything around.