debundesliga1-9, Exercise 1: The academy system

Model answer:

After a poor showing in 2000, clubs in the top divisions were required to run youth academies to a set standard, with qualified coaches, schooling alongside training and proper facilities, so that young players developed technically and tactically from an early age.

To say it caused the 2014 win you would need evidence: the share of the 2014 squad who came through academies; comparisons with other countries' squads and systems; changes in player quality over time; and the role of other factors such as coaching and luck. A single tournament win is weak evidence on its own. Details should be checked.