Ответ:

  1. 1 — d: In places like train stations and shopping malls.
  2. 2 — a: Pictures with many small tiles.
  3. 3 — b: Stones, ceramic, glass, paper.
  4. 4 — c: Glue.

Ответ: 1 — d, 2 — a, 3 — b, 4 — c.