Identify the non-contact forces:
Gravitational force, Tension force, Friction force, Magnetic force, Air resistance force, Electrostatic force.

Explanation

To identify the non-contact forces from the given list, we will analyze each force based on the definition of non-contact forces. A non-contact force is one that acts on an object without any physical contact between the objects involved.

### Step-by-Step Solution:

1. **Gravitational Force**:
- Gravitational force is the force of attraction between two masses. It acts at a distance and does not require physical contact.
- **Conclusion**: Gravitational force is a non-contact force.

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