What is the clause in parentheses an adjctive or adverb clause Edgar Allen poe was an American author (who wrote gothic and macrabe short stories)?

The clause in parentheses, "who wrote gothic and macabre short stories," is an adjective clause. It provides additional information about the noun "Edgar Allen Poe," specifically describing what kind of author he was. Adjective clauses typically begin with relative pronouns like "who," "which," or "that."