Laser printer and internal combustion engine: what they have in common

1. Step 1. Laser printer — is made of — Carbon. Toner is carbon black in resin.
2. Step 2. Carbon — is material for — Tyre tread. With carbon black for strength.
3. Step 3. Tyre tread — is part of — Pneumatic tyre. A tread.
4. Step 4. Pneumatic tyre — is part of — Motorcycle. Pneumatic tyres on both wheels.
5. Step 5. Motorcycle — has part — Internal combustion engine. A motorcycle is driven by a combustion engine.

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