A desert forms when rainfall decreases in a dry climate
Answer:
I think its never but sorry if im wrong
The geographic term “Asia” was originally used by ancient Greeks to describe the civilizations east of their empire. Ancient Asian peoples, however, saw themselves as a varied and diverse mix of cultures—not a collective group. Today, the term “Asia” is used as a cultural concept, while subregion classifications describe the distinct geopolitical identities of the continent. These classifications are Western Asia, Central Asia, Southern Asia, Eastern Asia, Southeastern Asia, and Northern Asia.