Six-year-old Roman is an expert bike rider. He loves to share his expertise with anyone who will listen to him. Roman's favorite line is "If you wanna go really, really, really speedy fast, you hafta push real hard on the pedals

" Roman's understanding that the pedals on the bicycle in some way control the speed of the bicycle illustrates
a. intuitive thought. c. identity.
b. functionality. d. conservation.

a