Final answer:
There are four fundamental forces in nature: gravitational, electromagnetic, weak nuclear, and strong nuclear, with the electromagnetic and weak forces considered manifestations of the electroweak force under certain conditions.
Step-by-step explanation:
There are four fundamental forces in nature. These are the gravitational force, the electromagnetic force, the weak nuclear force, and the strong nuclear force. Each force plays a critical role in the universe, from holding together nuclei to governing the motion of galaxies. While the strong and weak nuclear forces act over very short distances within atomic nuclei, the gravitational and electromagnetic forces have a much larger range. For a long time, these forces have been studied separately, but in particle physics, the electromagnetic and weak nuclear forces are now considered to be different manifestations of one force, known as the electroweak force, especially under conditions of high density and temperature similar to those in the early universe.