Final answer:
The strongest of the four fundamental forces responsible for binding atomic nuclei together is the strong nuclear force. It is a very potent force that acts over distances of about 10^-15 meters, essential to the stability of atomic nuclei.
Step-by-step explanation:
The strong nuclear force is the short-range force responsible for binding atomic nuclei together. It is the strongest of the four fundamental forces of nature, which includes the gravitational force, the electromagnetic force, and the weak nuclear force. The strong nuclear force acts over very short distances, approximately 10-15 meters, about the size of an atomic nucleus. Unlike the electromagnetic force, which has an infinite range and is 1/100th the strength of the strong nuclear force, the strong nuclear force is much more potent and ensures the stability of atomic nuclei by holding protons and neutrons together. Hence, the answer to the question is the strong nuclear force.