Here's why:

* No direct touch: Gravity acts between objects without them needing to physically touch each other. For example, the Earth's gravity pulls on the moon, even though they are millions of kilometers apart.

* Field force: Gravity is a field force. This means it's created by a field that surrounds objects with mass. The strength of the field depends on the mass of the object.

* Attractive force: Gravity always acts as an attractive force, pulling objects towards each other.

Examples of non-contact forces:

* Magnetic force: Magnets attract or repel each other without touching.

* Electric force: Charged objects interact with each other without touching.

* Nuclear force: This force holds the nucleus of an atom together, despite the repulsion between the protons.