Diachronic change is the "what" that affects constant change on the English language.
Answer: C
Explain: it is the only answer that has a sensory component, “echoed in our ears.”
The first blank is the chord "I" and the second blank is the chord "IV" in roman numerals.
Answer:
https://www.coursehero.com/file/p1fipq6l/Selected-Answer-True-Question-37-16-out-of-16-points-The-plot-of-Oedipus-Rex/ saw the same question in this
The answer would be to reinforce important ideas.