How has spirituality shape music over the past few centuries?

Igotta why is there only 2 semesters and 4 quarters and not 4semesters and 4 quarters? 1 quarter for each semester? ? is this a dumb question?

This is a form of government run by elected leaders.this is a type of government in which a group of individual states are united under astrong, central government.this is a system of government in which the people participate directly in making allpublic policy.this is form of government in which a monarch is the head of state but his or her powersare restricted by law, usually within a parliamentary system.in this type of government, the elected head of the executive branch acts independentlyof the legislative and judicial branches.in this type of government, there is no clear-cut separation of powers between thelegislative and executive branches, though the legislative has most of the governmentalpower.in this type of government, the institutions of the state are governed as a single unit,with one constitutionally created legislature.this is a type of government in which power is held by a single, self-appointed ruler.

Need some ! asap i need to figure out 3 major changes in bridges over time and why these changes to adapt to both improvements in technology and changing social links would also alot.