Abdus Salam from Pakistan

No. The electric force, the strong nuclear force, and the electroweak force

are all stronger than gravity.

Light, photons or rather the electromagnetic force was created by a process called Electroweak symmetry breaking. This took place several seconds after the big bang.

Chemical energy is the energy that is found in the chemical bonds of molecules. These bonds are electromagnetic in nature, so the electroweak force would be responsible for chemical energy.

The gravity of your question was not thought about for millenia. Sir Isaac newton was the first to postulate on it. Hmm... it's one of the three forces in the universe. Could it be the electroweak force? The strong force? The- uh, whats that other one...

Gravity!