What does it mean to define "boundaries" of an ecosystem?

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.

instead of copying and pasting things off of tests or work done on computer which im sure you did, try and read over the question carefully