Cellophane and sickle: what they have in common

1. Step 1. Cellophane — is made of — Cellulose. Cellulose.
2. Step 2. Cellulose — is material for — Wood pulp. Wood cellulose.
3. Step 3. Wood pulp — is used in — Paper machine. The raw material.
4. Step 4. Paper machine — has part — Belt drive. The wire moves on belts and rolls.
5. Step 5. Belt drive — is part of — Combine harvester. Belt drives.
6. Step 6. Combine harvester — evolved from — Sickle. The machine replaced reaping by hand.

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