Answer:
Volcanoes / earthquakes —> line (compound subject) , cause —> two line (simple)
1. Rome / Florence —> line (compound subject) , are —>two line (simple)
2. Sara / Caloline —> line (compound subject) , were chosen —>two line (simple)
3. Cinders / ashes —> line (compound subject) , rose —>two line (simple)
4. people / animals —> line (compound subject) , mingle —>two line (simple)
5. Historians / archaeologists / tourists —> line (compound subject) , love —> two line (simple)
6. paintings / objects —> line (compound subject) , were —>two line (simple)
7. Smoke / exhaust —> line (compound subject) , pollute —>two line (simple)
8. Hot dogs / hamburgers —> line (compound subject) , sizzled —>two line (simple)
9. mummies / pyramids —> line (compound subject) , are —> two line (simple)
10. uncle / brother —> line (compound subject) , visited —> two line (simple)
11. Shama —> line (compound subject) , swim —>two line (simple)
12. Gold / silver —> line (compound subject) , cost —>two line (simple)
13. Food / dishes—> line (compound subject) , filled —> two line (simple)
14. doctor / nurse —> line (compound subject) , waited —> two line (simple)
I hope I helped you^_^