<span>Restrictive clauses are essential for the meaning of a sentence and are never separated from the rest of the sentence using commas, unlike the nonrestrictive ones. So, having that in mind, the sentences that contain a restrictive clause are 1 and 3. In both of these sentences, restrictive clauses (in 1, that we found in the shed, and in 3. that I grew up in) are important to understand the whole sentence and cannot be deleted. In 2 and 4, however, the clauses inside the commas are not relevant for the meaning of the whole sentence. </span>
