Given information is not enough to answer your question appropriately. Let me start explaining with the cases that we can extract from given information:
Case 1: Stacy was driving the car - in this case, Stacy was in driver seat.
Case 2: Someone else was driving the car - in this case, Stacy was in passenger seat.
3) add information that further explains or defines the main idea.
Extension mean to add on to, so 3) is the correct answer.
Answer:
3. A porcupine.
Explanation:
From the file attached, the excerpt is from Chapter 8 of The Hatchet by Gary Paulsen where he describes how Brian was attacked in the middle of the night by a weird animal which he could not see in the darkness. From the narrative, the animal smelt of rot, it slithered and made a brushing sound towards his legs and he kicked out and threw a hatchet but missed.
His legs felt as if "a hundred needles have been driven into it" and he touched the group of needles that were stuck in his legs and discovered they were quils from a porcupine.