The pronouns that are used to connect a clause or a statement are called relative pronouns. A relative pronoun introduces a clause that describes a noun. This clause is called an adjective clause.

The following relative pronoun introduces the adjective clause (underlined) that provide information necessary to identify the noun:

Education is the most powerful weapon, which you can use to change the world.

The relative pronouns are that, which, who, whom and whose.

Examples

• The man who came yesterday was a fraud.
• The pen, which you gave me, is defective.