The correct phrase to use when describing the content or structure of something is "comprises." The word "comprises" is used to indicate that something includes or contains certain components or parts. Therefore, the correct option for the sentence is "comprises," as it indicates that the book includes five sections.
Incorrect options explained:
- "Comprises of" is incorrect as "comprise" does not require the preposition "of."
- "Consists" generally requires "of" after it (e.g., "consists of five sections") and does not directly fit the structure of the given sentence.
- "Comprises to" is not a grammatically correct structure in English.
Therefore, the most grammatically correct and natural choice is "comprises," making the completed sentence: "This book comprises five sections."