A. The pressure is lower as you gain altitude because there are more molecules of oxygen and nitrogen. B. The pressure is lower as you gain altitude because there are less molecules of oxygen and nitrogen. C. The pressure is the same because there is no change in the number of molecules.
The price of a cockatiel depends on a few factors. Firstly the price depends on whether or not the bird is tamed. For a tamed cockatiel it would cost around $80 - $120 and a untamed cockatiel would cost $15-$30 (AUS) Also the colouring of the cockatiel plays a part in the cost of the bird, as more rare colours (such as lutino or pearl cinnamon) may increase the cost of the cockatiel.
Coquille/Hackle Corsage W/Pin. Rooster plumage feathers have been arranged in a circle on a 1.75 alligator clip. On top of the plumage is a raised circle of Rooster hackle feathers. Size: 6. Order # FR Coquille Corsage. Price: $6.00 USD ea.