Question

Why does hosa require students join through a local chapter instead of joining as individuals? hosa activities are so closely connected with the school curriculum. hosa membership would be too expensive for individuals to afford. all hosa activities are structured as team competitions. hosa members must take frequent tests.?

Answer 1

The reason why hosa require students to joint through local chapter instead of joining as individuals is : 
Hosa activities are so closely connected with the school curriculum,
And this curriculum usually more compatible if it's carried out in groups.

Answer 2

The answer is HOSA activities are so closely connected with the school curriculum.