Sexual beliefs and behaviors vary from place to place, suggesting that factors play a role in sexual motivation.

Cultural factors

Explanation:

Sexual motivation also known as sex drive, is the urge to fulfill sexual needs, whether through physical sexual interaction or by seemingly unrelated (sublimation) behaviors.

Within Freudian psychology, earlier sexuality principles have been expanded to cover all things from which gratification is derived. Cultural and intellectual accomplishments could therefore be viewed as the result of sublimated sexual drives.

As he further created the theory, Freud saw sex drive as being in confrontation with violence, as well as the balance between these two strong motivating forces was considered to result from other drives.

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."