Classify the subordinate clause as a noun, adjective, or adverb clause. Indicate whether it is introduced by a relative pronoun, a subordinating conjunction, or neither.
A subordinate clause is a clause that contains both a subject and a verb, but cannot stand on its own because it does not convey a complete message. It needs the main sentence in order to clearly understand its thought. The subordinate in the given sentence is: the children enjoyed. This is an adjective clause, which modifies the noun "book". It is not introduced by any subordinating conjunctions.
