which sentence contains a nonrestrictive clause?\nbe sure to watch that movie i gave you.\nthe man who…

which sentence contains a nonrestrictive clause?\nbe sure to watch that movie i gave you.\nthe man who drives our bus is ill.\ntake a left after that house with the yellow fence.\nthe old apron, which belonged to mama, is torn.
Answer
Brief Explanations:
A non - restrictive clause is set off by commas and provides non - essential information. In "The old apron, which belonged to Mama, is torn.", "which belonged to Mama" is set off by commas and gives extra information about the apron. It can be removed without changing the basic meaning of the sentence. The other sentences do not have such non - restrictive elements.
Answer:
The old apron, which belonged to Mama, is torn.