The relative pronoun that is used with an essential clause, and the relative pronoun which is used with a nonessential clause. In 3 short sentences, explain when to use each pronoun and the difference between the two types of relative clauses. (2 points).

The relative pronoun "that" is used with an essential clause, which provides necessary information to the sentence and cannot be removed without changing the meaning or structure. For example: "The dress that I bought yesterday is beautiful." Here, the clause "that I bought yesterday" is essential to identify which dress is being referred to.

The relative pronoun "which" is used with a nonessential clause, which provides additional, non-essential information to the sentence and can be removed without altering the meaning or structure. For example: "I love my new dress, which I bought yesterday." Here, the clause "which I bought yesterday" provides extra information about the dress, but the meaning would still be clear without it.

The key difference between the two types of relative clauses is their importance to the meaning of the sentence. Essential clauses are necessary for the sentence's meaning, while nonessential clauses provide additional, but not crucial, information. Both types of clauses are introduced by relative pronouns but serve different purposes in the sentence structure.