Identify the adverb clause underlined in the following sentence.
(1) They fought as heroes do.
(2) I expect that I shall get a prize.
(3) Here is the book you want.
(4) I fear that I shall fail.

The correct answer is Option A (They fought as heroes do.).

Key Points:
• Concept: Identification of Adverb Clauses. An Adverb Clause modifies a verb, adjective, or another adverb in the sentence, expressing manner, time, place, reason, etc.
• Explanation: In 'They fought as heroes do', the clause 'as heroes do' modifies the verb 'fought' by expressing the manner in which they fought. This is an Adverb Clause of Manner.
• Other Options:
• Options 2 & 4 contain Noun Clauses starting with 'that' acting as objects.
• Option 3 contains an Adjective Clause modifying 'book'.
• Official Key: Option 1 is the official answer.
• Key Takeaway: Remember: Clauses modifying verbs by answering 'how' (e.g., 'as heroes do') are Adverb Clauses of Manner.