The action of Schaffer dismissing the sighting of smoke caused the fire to grow, for he did not bother to alert anyone else. Neither did he try to do something about the fire.
Past participle, hope this helps
The Power or Sympathy is a sentimental novel, dealing with domestic life.
I hope it helps!
The answer would be D, since a quartet means 4, and a triumvirate means 3. So again the answer is 4:3.