Trousers and submarine: what they have in common

1. Step 1. Trousers — has part — Zip. A fastener.
2. Step 2. Zip — is part of — Bag. A zip.
3. Step 3. Bag — is made of — Leather. Leather.
4. Step 4. Leather — is material for — Submarine. It was covered with leather.

Open Evothings