Friction arises on account of……..at the ……..

Explanation

**Step-by-Step Solution:**

1. **Understanding Friction:** Friction is a force that opposes the relative motion between two surfaces in contact. It arises due to the interactions at the surface level.

2. **Identifying the Cause of Friction:** The primary cause of friction is the adhesive forces that exist between the molecules of the two surfaces in contact. These forces create resistance to motion.

3. **Recognizing the Role of Contact Points:** Friction occurs specifically at the actual points of contact between the two surfaces. Even if the surfaces appear smooth, at a microscopic level, they have irregularities that lead to contact points.

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