Questão 268925

The syntactic structure of English allows for complex noun modification through groups of words that function as a single unit. These units, known as adjectival phrases, provide necessary detail and nuance to nouns or pronouns, effectively answering questions such as Which one? or What kind?. Unlike simple adjectives, these phrases can be headed by adjectives, prepositions, participles, or infinitives. In the sentence: The historical documents kept in the national vault are accessible to researchers, the underlined portion represents a specific type of adjectival phrase. Analyze its function and structure.