How is a wrestler in WWE chosen to be a champion?

Answer 1

Wrestlers may be chosen to become 'Champions' for many reasons. Good work in and around the ring, and an overall good work ethic. Although some decisions may be based on fans opinions. What must be remembered is that all decisions are those of the creative team of writers for any given company, E.G - WWE, TNA, ROH etc.

Answer 2

The professional wrestlers aren't picked!
What they do is on a first episode of Wrestling they will put all the wrestlers in one match to fight for a title so who ever gets the first pin wins the championship but in other episodes there can be 4,3, or 2 man matches for the title and if the wrestler with the championship gets pinned he loses the championship but he can get a rematch.