Why do snakes move in zig-zag manner?

Explanation

**Step-by-Step Solution:**

1. **Understanding Snake Anatomy**: Snakes are classified as reptiles and are unique because they do not have legs or hands. This absence of limbs significantly influences how they move.

2. **Muscle Movement**: The primary mechanism of movement in snakes is through muscular contraction and relaxation. This means that their muscles work in a coordinated manner to create movement.

3. **Wave-like Motion**: The contraction and relaxation of the muscles allow snakes to move side to side. This side-to-side movement results in a wave-like motion, which is essential for their locomotion.

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