teachers who make me think are my favorite teachers.\nrestrictive\nnonrestrictive\nno added clause

teachers who make me think are my favorite teachers.\nrestrictive\nnonrestrictive\nno added clause
Answer
Brief Explanations:
The sentence has a clause "who make me think" that identifies which specific teachers are favored. It is essential to the meaning (without it, the sentence loses its key defining detail), so it is a restrictive clause.
Answer:
restrictive