Final answer:
The gravitational force between objects depends on their mass. On a large scale, like between the Earth and a human or a capitol building, gravitational force dominates because it is always attractive. However, on a small scale, gravity is negligible compared to other forces like electromagnetic forces.
Step-by-step explanation:
Gravity is a "built-in" property of mass. Whenever there are masses in the universe, they will interact via the force of gravitational attraction. The more mass there is, the greater the force of attraction. Here on Earth, the largest concentration of mass is, of course, the planet we stand on, and its pull dominates the gravitational interactions we experience. But everything with mass attracts everything else with mass anywhere in the universe. Gravitational force on a large scale dominates interactions between large objects because it is always attractive, while Coulomb forces tend to cancel.