Elevator and plough: what they have in common

1. Step 1. Elevator — has part — Pulley. The rope runs over a pulley.
2. Step 2. Pulley — has part — Wheel. A pulley is a wheel with a groove for a rope.
3. Step 3. Wheel — is part of — Stagecoach. On four wheels.
4. Step 4. Stagecoach — uses — Horse collar. It is pulled by horses.
5. Step 5. Horse collar — is used in — Plough. The horse collar made ploughing with horses possible.

Open Evothings