You are presented with the quiz "What can damage plumbing?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "tectonic plates being pushed together causes earthquakes" and "plumbing is sometimes damaged during an earthquake". So, what's the best answer to the question?
Options are: [i] several different ways; [ii] an automobile engine; [iii] Breathing too fast or too slow; [iv] smallest agents of disease; [v] fissures of hot, acidic water; [vi] volatile substances; [vii] tectonic plates being pushed together; [viii] erosion from rivers;
Answer:
[vii]