I start from a single point; I spread and touch many without moving myself. What am I?

Category: Brain · Difficulty: medium

Hint: Consider what creates expanding circles without traveling far.

Answer

A stone dropped in water

Explanation

Dropping a stone in water causes ripples that expand outward, affecting the surface without the stone moving once submerged.

This is a medium brain riddle — a moderate challenge for most people. The answer is A stone dropped in water.

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