Complex noun phrases pack large amounts of information around a head noun using premodifiers (adjectives, nouns, participles before the noun) and post-modifiers (prepositional phrases, relative clauses, infinitives, that-clauses after the noun). They are the backbone of academic and professional English.
Nouns can be post-modified by prepositional phrases, relative clauses, participle phrases, infinitive phrases, and that-clauses. Identify the correct post-modifier.