Final answer:
In the sentence, the linking verb is 'is,' and the predicate noun is 'heroine,' describing who Matilda Wormwood is in Roald Dahl's 'Matilda.' There is no predicate adjective in this sentence.
Step-by-step explanation:
To select the linking verb and the predicate noun or predicate adjective in the sentence "Quiet bookworm Matilda Wormwood is the heroine of Roald Dahl's popular book Matilda," we first need to identify the main components of the sentence. The subject is "Matilda Wormwood," and the verb that connects this subject to the rest of the sentence is the linking verb "is." This linking verb is followed by the predicate noun "heroine," which describes who Matilda Wormwood is in relation to the book. Therefore, in this sentence, the linking verb is "is" and the predicate noun is "heroine." It's important to note that a linking verb connects the subject with a subject complement that can be either an adjective or a noun, providing more information about the subject.
It's also useful to understand why we don't have a predicate adjective in this sentence. Although "quiet bookworm" provides descriptive elements about Matilda, these are attributes that form part of the complete subject, rather than a subject complement or predicate adjective which would follow a linking verb to describe the subject.