Whick climate factor involves a decrease in tempurature due to lower air pressure

My guess is elevation because because if you break down the word elevate means higher. So the higher you go in the sky, the lower the air pressure gets. Because the air gets tighter. When you climb a mountain, the higher you get the harder it is to breath because the air pressure gets tighter

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.