I am pretty sure number 4 is your answer
C.Stimulation of thoracic or lumbar spinal regions,chain ganglion,acetylcholine release
You have the word which, that means there are more than one answer.Here is a short answer. Reflection<span> is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated. Common examples include the </span>reflection<span> of light, sound and water waves.</span><span />
The role of the Hemoglobin Carries oxygen through the blood and a small amount of carbon dioxide.