system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer Fantasy] Do human mages choose which Wind they're gonna master?

As in the title, is it explained anywhere in the lore the way a human mage choose his Wind? 

Is it a free choice? 

Does the Empire have any say on it? (Like, "we need more Fire Mages")

Do mages have a Wind they're naturally more inclined to master? Is there a system to identify it? 

Or is it the Wind that chooses the mage altogether? (lol)
gpt
Generally,  each mage is drawn to the Wind that suits them best. It's even codified into law in the Empire that a Magister must take a candidate to the appropriate College of they don't  match that particular Magister's Order. 

In some cases, however, they may be forced to accept training in a different area than their aptitude due to other factors, such as availability of trainers.