Analyzing why and how has the U. S. Constitution been amended and intrepreted throughout our history?

There are amendments or changes to the constitution that have happened throughout history and this is mainly due to political conflicts (powers) and changes and for economic interest.

Explanation:

Some of the amendments that have been adopted have generally come about because of widely recognized problems or a sustained campaign for reform. Some examples of the constitutional amendment include:  amendment to permit students to pray in school; an amendment to guarantee women equal rights; an amendment to prohibit abortion; an amendment to define marriage and etc.

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."