Which option best describes nitrogen?

a process in which certain bacteria in the soil and in the roots of legumes convert nitrogen gas into ammonia

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.

a covalent bond, specfically triple bond