That would be a noun because it's a person stating it.
'Exert' means to apply force on influence over something else, this can be in a negative or positive way. In this quotation, it means that language, if used correctly, has the ability to express a 'hidden power'. It's also worth mentioning that the simile is relevant as the moon has an influence on the level of tides on Earth.
Answer:
5. A
6. B
7. D
8. C
9. A
10. A
11. C
12. A
13. D
14. A
15. What are the answer choices?
hope this helps <3
