What happens when the diaphragm relaxes (Do you inhale or exhale)?

When the diaphragm relaxes, you are in exhale. The diaphragm is not relaxed when it is inhaling.  

When you press on the diaphragm, you are also caused to exhale.

I hope this helps :)

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.