A student started a model to show the cycling of carbon.

Food Cellular respiration Carbon dioxide ?

What should the student add to the model next?

A.
Decomposers

B.
Mitochondria

C.
Krebs cycle

D.
Photosynthesis

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.