Nnormal exhalation, the diaphragm and intercostal muscles relax to contract the chest, which creates a positive pressure. this is what type of process?

This is the passive type of process.

As the diaphragm relaxes, the pleural cavity contracts, which exerts pressure on the lungs. As a consequence, the volume of the lungs reduces and the air is passively pushed out of the lungs. Exhalation is passive, thanks to the elastic properties of the lungs.

we would need to see the picture to answer it

if you know your abc's you should be able to get your answer or just use google