English STAAR Practice Test 2025 – The All-in-One Guide for Exam Success!

A supporting detail is defined as evidence or information that reinforces or elaborates on the main idea of a text. It provides the necessary backing that helps readers understand and believe the main concept being presented. Supporting details can include facts, examples, statistics, anecdotes, or quotes that illustrate and substantiate the primary argument or theme.

In this context, distinguishing a supporting detail from other concepts is critical. For example, identifying the main idea is essential, but it represents the overarching theme rather than the specifics that provide depth and clarity. Similarly, information that contradicts the main argument serves to weaken rather than support the claim, which is contrary to the role of supporting details. Lastly, conclusions drawn from arguments summarize and reflect the implications of the evidence presented but do not represent the evidence itself. Hence, the correct answer emphasizes the function of supporting details in validating and strengthening the central idea of a text.