Find the sentences in the text where these words occur:

erupt    surge   trace   undistinguished   casualty

Look these words up in a dictionary which gives examples of how they are used.
Now answer the following questions.
1. What are the things that can erupt? Use examples to explain the various meanings of erupt. Now do the same for the word surge. What things can surge?
2. What are the meanings of the word trace and which of the meanings is closest to the word in the text?
3. Can you find undistinguished in your dictionary? (If not, look for the word distinguished and say what undistinguished mean.)