Your friend Aria is complaining that programming seems too complicated. She says, "Why do we need things like sequence, selection, iteration, and variables? It's too much to bother with." Explain to Aria what control structures like sequence, selection, and iteration do and why they are needed. Then tell her why variables are important in programming.

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

a. spokes of a wheel.

as indicated in the question radial contains rad, also found in radius, so the fracture's would span the radius.