Which of the following is the role of fossil fuels in the carbon cycle? O A. Preserving extinct organisms
B. Building up carbon dioxide in the air
C. Keeping populations of plants under control
D. Storing excess carbon underground

Which pair of sentences is describing the same velocity? a. a car is parked. a car is moving in circles. b. a bus drives 40 miles per hour north. a truck drives 50 miles per hour north. c. a boy walks east at 6 kilometers per hour. a girl walks west at the same speed as the boy. d. valerie rides her bike south at 8 kilometers per hour. owen jogs south at 8 kilometers per hour.