What force causes all objects in the universe to be attracted to one another?

The force that causes all objects in the universe to be attracted to one another is gravitational pull. This fundamental force acts between all masses, regardless of their size, and is responsible for the attraction between objects both on Earth and across the cosmos.

Gravitational force operates over long distances and is a key factor in the movement and behavior of celestial bodies. For example, it governs the orbits of planets around stars, the motion of galaxies, and the overall structure of the universe. Every object with mass exerts a gravitational force, which is why we are pulled toward the Earth, and it also helps keep the Moon in orbit around our planet.

Unlike magnetic or electromagnetic forces, which depend on charge and can be either attractive or repulsive, gravitational pull only attracts. Additionally, the nuclear force is limited to very small scales, such as within atomic nuclei, and does not operate on the same level as gravitational interactions do in the larger universe. Therefore, gravitational pull is the correct answer as it encapsulates the universal attraction between all masses.