Answer:
What describes the purpose of a thesis statement in an interpretative essay is the sentence that shows the theme present in this essay.
Step-by-step explanation:
The essay is a text of a critical nature about a certain debate or question of a scientific nature. In this sense, the essay is discursive, in the sense of showing the author's position and interpretations regarding the subject under consideration. For this reason, the phrase that determines this theme best describes the purpose of a thesis statement in an interpretive essay.