Correct Answer:
Option A - The underlined word of the above given sentence 'fighting' is 'noun' because 'fighting' is a 'gerund' that has been made from a verb (V₁+ing), act as a noun;
A. The underlined word of the above given sentence 'fighting' is 'noun' because 'fighting' is a 'gerund' that has been made from a verb (V₁+ing), act as a noun;