Given the question: Question: Alex is playing with his toy car outside. He rolls the toy car across the parking lot and it zooms by. His mother tells him to move away from the parking lot so he goes to the back yard. Alex tries to roll the toy car, but it doesn't go as quickly. That's because the _____ has more friction. (A) parking lot (B) grass  Do not use A and B to answer the question but instead, choose between "parking lot" and  "grass".
The answer is:
grass