Answer:
C). Losing control and giving in to instinct.
Step-by-step explanation:
The theme is illustrated as the central idea or claim of the author that he/she intends to convey through his/her work. It functions to drive the narrative forward and binds the text as a whole and describe the meaning of the work.
As per the question, the theme that is clearly reflected by the given monster is 'losing control and giving in to instinct' as it relates the main idea of the given description that is being conveyed and unites the passage together and makes it meaningful. The loss of control is mirrored by the phrase 'berserk every time' and it's given into instinct when it 'starts hunting people like an animal'. Thus, option C is the correct answer.