The circles, or orbits, for electrons

If it is the fill in the blanks.The answer is The circles,or orbits,for electrons are called energy levels.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

i think the answer is b.