Did democracy in athens reached its height under the rule of a brilliant elected leader named cleisthenes? and if not what's the right answer?

Yes the democracy was created by Cleisthenes in Athens in 500 BC because he did not support aristocracy. hope this helps:)  

The  frame of government of pennsylvaniawas a constitution for the  province of pennsylvania a  proprittarycoony granted to  william penne by  charles ii of england. the frame of government has lasting historical importance as an important step in the  development of american and world democracy.