This question is designed to test the understanding of 'context' in language comprehension. * **Core concept:** 'Context' refers to the background information or circumstances that surround a piece of text, which aids in the interpretation of its meaning. * **Correct Answer (B):** Option B accurately defines context as the surrounding information that clarifies the meaning of words and phrases. Understanding context is vital for accurate communication and interpretation. * **Option A:** This describes the text's format, not its background meaning. The structure is how the text is organized, not what provides context. * **Option C:** While grammar is crucial for sentence construction, it is not what defines context. Grammar deals with the rules, context refers to the surroundings. * **Option D:** The author's opinion can influence context but isn't context itself. Context provides the frame that author’s opinion is within. * **Key Takeaway:** Context is crucial because words and phrases can have different meanings in different situations.