Tall wooden churn and greenhouse: what they have in common

1. Step 1. Tall wooden churn — is part of — Butter churn. A tall narrow container.
2. Step 2. Butter churn — uses — Lever. A dasher.
3. Step 3. Lever — is used in — Shaduf. A shaduf is a lever with a counterweight.
4. Step 4. Shaduf — is used in — Irrigation. The shaduf fed water into the canals.
5. Step 5. Irrigation — is used in — Greenhouse. Watering plants.

Open Evothings