Why were the british colonists upset about england's navigation acts?

The Navigation Acts were a series of laws passed by the British Parliament that imposed restrictions on colonial trade. ... The Navigation Acts inflamed the hostilities of American colonists and proved a significant contributing event leading up to the revolution

The  pan-african movement  was an "emotional, cultural, psychological and ideological  movement  that began among the  african  dispora in the western hemisphere, for a closer  purpose, so that  african  people could feel secure, attain political, economic as well as psychological power visa vis other races or world regions" .

They made a checks and balance system to equal power within the branches. the "check" meant that one branch would watch one branch and "balance" them if they were too powerful. if you want more info on this, i would just google checks and balance system.