Question

which force holds protons together with the most powerful force in the universe?
strong nuclear force
electromagnetism
weak nuclear interaction
gravity

Explanation:

The strong nuclear force is the most powerful of the four fundamental forces in nature. It acts over very short distances within the atomic nucleus and binds protons and neutrons together. Electromagnetism deals with electric and magnetic fields, the weak nuclear interaction is involved in radioactive decay, and gravity is the weakest of the fundamental forces and acts over long - range between massive objects.

Answer:

strong nuclear force