Hoe blade and headphones: what they have in common

1. Step 1. Hoe blade — is part of — Hoe. A plate set across the handle cuts into the soil.
2. Step 2. Hoe — is made of — Stone. The working part was of stone or antler.
3. Step 3. Stone — is material for — Stadium. Ancient stadiums had stone stands.
4. Step 4. Stadium — has part — Public address system. Sound.
5. Step 5. Public address system — has part — Loudspeaker. Loudspeakers.
6. Step 6. Loudspeaker — is part of — Headphones. Miniature drivers.

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