The answer is: C. subject pronoun
.
Subject pronouns like <em>I, she, he it, you, we </em>and <em>they </em>replace a noun as the subject or main actor of a sentence or clause. They also function as the subject of the verb, so they perform the action of the predicate.
The rest of the alternatives are incorrect because possessive pronouns indicate possession (what belongs to whom), object pronouns work as direct or indirect object of the verb, and reference pronoun refers to pronoun agreement.
He finds food in the wilderness, such as berries that make his stomach upset the next morning. Later on, he kills a bird and is disgusted with the organs in him, unable to eat him, he tries to find another food source. But then, he decides to take out the organs of the bird and cook it.
It is John Gardner's novel "Grendel" from 1971 that initiated the trend of telling a story from a monster's point of view. The story is essentially the epic poem Beowulf spoken trough the eyes of Grendel