What is the elements in pre-historic in ancient art era

Although many musicians participated in the bebop revolution, and history has undoubtedly forgotten many who were in the trenches of the harlem jam sessions, it is clear that the most important and influential architects of bebop were and

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.

Based on the sentence, what does a studious effort require