To determine how the author develops the central idea throughout the text, it would depend on the specific content and context of the text in question. However, if we consider the options provided:
- A focuses on describing plots, which might support a central idea but doesn’t necessarily develop it.
- B involves comparison and contrast, which could help in understanding the horror genre in relation to others, potentially enhancing the central idea.
- C suggests providing strategies for analysis, which would suggest a deeper exploration of the genre, possibly developing the central idea effectively.
- D posits a specific argument about the horror genre's focus, which can be a strong way to develop a central idea if that theme is supported throughout the text.
To choose the best answer, one would need to analyze which option best embodies the author’s approach in the text. Among these, C seems to provide a broad and analytical approach, likely contributing significantly to developing a central idea about the horror genre.
So, the answer is likely:
C She provides various strategies to analyze the horror genre.