How does a cell maintain homeostasis? A. Regulates what enters and leaves the cell
B. Structure and support
C. Flexibility
D. Protective barrier

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.