4.
some two-story houses have heat only on the bottom floor. how does the upstairs get heated? (5 points)
radiation
convection
conduction
osmosis

i think its the first one

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.