Final answer:
The table of contents, index, and glossary are text features that students may find useful when previewing informational texts for a research project.
Step-by-step explanation:
The text feature that students are likely to find most useful when previewing informational texts such as library books for a research project is the table of contents. The table of contents provides an outline of the book's structure and allows students to quickly find specific information within the text. It helps them determine which chapters or sections are most relevant to their research topic.
The index is also a useful text feature as it provides an alphabetical list of important terms, names, and topics mentioned in the book, along with the corresponding page numbers. This can help students locate specific information or navigate to relevant sections of the book.
While the glossary is valuable for understanding the meaning of specialized terms, it may not be as useful for previewing texts as the table of contents and index.