In a citizens elect the president as head of government separate loy from the legislature

In a FEDERAL REPUBLIC citizens elect the president as head of government separately from the legislature. In this kind of political organization, the state is divided in three powers, legislative, executive and judicial. The first one is lead by the president elected by the people as well as the senators and deputies who are part of the legislature. This division of powers allows the control between each other without abusing of their own power.

in an absolute  monarchy, the  monarchrules as an autocrat, with absolutepower  over the state and government — for example, the right to rule by decree, promulgate laws, and impose punishments. the  monarch isnominally sovereign but the electorate, through their legislature, exercise political sovereignty.