1.   The bright plumage of many male birds has evolved to attract females.

2.   But the NHL also is aware that the game needs to evolve to attract fans.

3.   He also said the sport is evolving to attract mostly young people, partly because of the low cost of older, noisier craft.

4.   Since then it has evolved to attract manufacturers who enter factory prepared vehicles, but majority of competitors remain racing enthusiasts albeit of considerable means.