Final answer:
The answer to the question is 'A. Electromagnetic force,' which alongside the gravitational force, the weak nuclear force, and the strong nuclear force, constitutes the four fundamental interactions in the universe.
Step-by-step explanation:
The four forces found in the universe are the gravitational force, the strong nuclear force, the weak nuclear force, and the electromagnetic force. These are the fundamental interactions that govern the behavior of matter at various scales, from the bindings of subatomic particles to the movement of galaxies. While both the weak and strong nuclear forces operate over very short ranges, such as within the nucleus of an atom, the electromagnetic force and gravitational force have effects over larger scales. The electromagnetic force itself is responsible for interactions between charged particles and encompasses both electric and magnetic forces. Therefore, the correct answer to the question is 'A. Electromagnetic force'.