This document discusses adjective clauses, which are also known as relative clauses. It provides examples of adjective clauses using the relative pronouns "which" and "whose". For "which", it is used for things or animals in the subject or object position of a sentence. For "whose", it shows possession and is used to connect to a noun, placing whose and the noun it is connected to at the beginning of the adjective clause. The document also includes some exercises asking the reader to identify the correct use of relative clauses in sample sentences.