Question

Which sentence has the 'essential phrase'?
The dog WITH A RED COLLAR is a purbread.
The raindrop rolled down the window, IN THE FRONT OF THE ROOM, very slowly.
Danielle's backpack, THE ONE NEXT TO THE DOOR, is full of notebooks and supplies.
Riley has on a purple sweater, MADE OF COTTON, that she got from her grandmother for Christmas.

Answer 1

Sentence 1: "The dog WITH A RED COLLAR is a purbread."

Reason: "with a red collar" is a restrictive (essential) phrase—it specifies which dog and is not set off by commas. The other sentences use commas to set off nonessential (parenthetical) phrases.