The correct answer is option two.
An infinitive phrase consists of an infinitive verb, and can be followed by a complement or a modifier, which is usually an adverb.
In the sentence above, the infinitive phrase comes before a complement "variety and interest to their writing."
Answer:
I'd say an upswelling or rapid increase.
Explanation:
Because the definition of surge is a sudden powerful forward or upward movement. "Sudden surge of fear" means a sudden increase of fear.
Adverb and adjective phrase was added
