Here's why:
* "Which" is used to refer back to a noun or noun phrase. In this sentence, it seems to be trying to refer to the qualities of Sarah (good student, helpful volunteer, great athlete). However, "which" cannot refer to a list of qualities.
* Pronouns need a specific, singular noun to refer to. "She" in this sentence correctly refers to Sarah, but "which" is left hanging without a clear connection.
Here's how to fix it:
* Use a different word: Instead of "which," use a more appropriate word like "because" or "this is why."
* Reorganize the sentence: "Sarah is a good student, a helpful volunteer, and a great athlete, which is why she received a scholarship." This makes the connection between the qualities and the scholarship clear.
* Make the sentence more concise: "Sarah's hard work as a good student, helpful volunteer, and great athlete earned her a scholarship." This removes the ambiguity and clarifies the reason for the scholarship.
Always make sure your pronouns have clear and specific antecedents to avoid confusion!