In the political arena, those who adamantly oppose war and those who strongly support war.

here are the choices for the blanks:

eagles
doves
hawks

The correct answer for the second line is hawks because hawks are usually seen as birds that are aggressive and like to attack others. The first line should fit doves because a dove is symbolically used for peace.

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.