Dry cell and bicycle: what they have in common

1. Step 1. Dry cell — is part of — Torch (flashlight). Batteries.
2. Step 2. Torch (flashlight) — has part — LED. Modern torches use LEDs.
3. Step 3. LED — is part of — Bike light with dynamo. An LED.
4. Step 4. Bike light with dynamo — is part of — Bicycle. A lamp.

Open Evothings