Max weber introduced the concept of life chances which says the idea that your probability of economic success is largely dependent on the social position you are born into.

The answer is "Life Chances".

Life chances is a social science theory of the opportunities every individual needs to enhance their personal satisfaction. The idea was presented by German humanist Max Weber. It is a probabilistic idea, portraying how likely it is, given certain variables, that a person's life will turn out a specific way. According to this theory, life chances are decidedly related with one's financial status.

send them to therapy or somthing like that

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."