Which of the following diagrams represents the refraction of waves?

B or the second one from the top

Explanation:

The waves don't bounce nor go straight through. They continue in the same motion but are slowed down, as seen in picture/diagram 2

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.