refers to the labor of the speaker to craft, control, or change the expression of feeling in public speaking.

Inflection

Explanation:

The public speaker has to be very aware of his audience as he delivers a speech and deliver accordingly the point they are trying to get across.

Through inflection a speaker changes their feeling and controls their craft to match with audience to deliver the desired effect they want to deliver.

This could be to shock a passive audience or to ride over an enthusiastic one with more aggressive words. It is impromptu and often done through oratory skills.

both are monotheistic however, christians believe jesus is the savior and jews believe jesus is just another prophet.

explanation:

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."