Here's why:

* Inductive reasoning starts with specific observations (the Sahara, Gobi, and Mojave deserts are air dry) and draws a general conclusion (all deserts are air dry).

* Deductive reasoning, on the other hand, starts with a general statement and applies it to specific cases.

In this case, the example is drawing a general conclusion about all deserts based on observations of specific deserts. However, it's important to note that this conclusion is not necessarily true. There might be deserts that are not air dry, and the example only provides evidence for the deserts mentioned.