Tank and aeroplane: what they have in common
- Step 1. Tank — has part — Armour. Armour protects the crew.
- Step 2. Armour — is part of — Ironclad. An armour belt.
- Step 3. Ironclad — evolved into — Aircraft carrier. The first aircraft carriers were converted from battleships and cruisers.
- Step 4. Aircraft carrier — uses — Aeroplane. Basing aircraft.