You are exploring in a cave and call out to one of your friends. you hear your echo. which interaction of sound (reflection, refraction or absorption) caused the echo and how did the sound waves move?

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.

c

explanation: