In an informational text, the parts that support a central idea are primarily evidence and citation of sources.
- Evidence refers to facts, statistics, examples, or quotes that help to substantiate the central idea.
- Citation of sources provides credibility and authority to the information presented, backing up the central idea with reliable references.
Transitions help to connect different ideas but do not directly support the central idea itself. Dialogue is rarely found in purely informational texts, as it is more characteristic of narratives.
Thus, for this question, both evidence and citation of sources are correct responses. However, if you can only choose one, the best answer is evidence.