The correct answer is D. Thesis
Step-by-step explanation:
In texts and presentations, the main point the author wants to convey is known as the central idea or the thesis statement. The term "thesis statement" is equivalent to the central idea but this term is mainly used in argumentative texts or speeches because the thesis is the main point you want to prove to the audience. Additionally, the thesis or main point is developed and supported by the author through details, reasons, facts, citations, among others. Thus, the central idea is also referred to as the thesis.