What motivates high school students to join professional organizations? getting higher credits participating in competitive events getting scholarships to further their education paying lower membership dues

 The thing which motivates high school students to join professional organizations is getting scholarships to further their education. Any student would like to attain an opportunity to get financial help for education. This is the main reason why high school students decide to join some professional organizations because most of them offer students from 30% off payment for education or to provide them with special scholarship, it depends on what kind of organization is joined.

Your answer is: increased air temperatures  hope this ! : )