Police have to read a suspect his or her miranda rights because it is required in the constitution.

Kind of but not really.

In Miranda, the Supreme Court set forth a new requirement wherein the police were required to tell suspects of their rights under the 5th Amendment.

So, while the Miranda Warning is not listed in the Constitution, the Miranda Warning does reference 5th Amendment rights.

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."

answer; sensory craving;