Answer:
A. Gerund
Step-by-step explanation:
A gerund is the noun form of a verb. Gerunds are verbs that end with -ing. In sentences, they could appear as phrases, subjects, direct objects, indirect objects, prepositions, predicate nouns, and objects of preposition. In the sentence provided, the gerund, 'Presenting' functions as the subject in the sentence.
A noun is the name of a person, animal, place, or thing. In this case, the gerund, 'presenting,' is the name of the activity that causes the speaker fear. Therefore, the gerund functions as both the noun and the subject.