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the word or phrase in parentheses in the following sentence: A study of living plants is (essential) to understanding fossils. a. direct object b. indirect object c. object complement d. predicate nominative e. predicate adjective

User Kwagjj
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The word essential is used in this sentence as E. predicate adjective.
A predicate adjective is the first adjective following a linking verb, such as to be, like in this sentence (is).
User Sanushi Salgado
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