Why are political parties considered an important part of a democratic political system?
a)they are included in the us constitution.
b)they provide a way to control individuals and shape politics.
c)they provide a way to organize individuals into political groups.
d)they were approved by the founding fathers.

d. i assume the underlined word is "role." reformat if it isn't.

explanation:

role is closest to part because when replacing words, "playing a vital decision," "playing a vital activity," and "playing a vital dollar" don't make logical sense. the only meaningful choice is "playing a vital part."

this fits one of merriam-webster's definitions of role: "a function or part performed especially in a particular operation or process."

the template that is used is page layout then the margins option and finally choose the normal option.