Which of these describes one of the functions of the nervous system?
a)providing the cells of the body with energy
b)sensing changes in the external environment
c)removing waste materials from the body
d)transporting nutrients throughout the body

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.