Your tone
Let's look at the other choices first. Your credibility is your ability to be believed as trustworthy in regards to the subject. Whether you're talking to a group of teenagers or professional adults, your credibility doesn't change. Your clarity also should not change based on the audience because you want to be clear in your message at all times. Also, your purpose should be the same no matter the audience. The only thing that would change is your tone. The way you approach a crowd of teenagers would vary greatly from the way you'd approach a room of professionals.
The analogy in the title “The Many Faces of Nigerian Food" alludes to the ethnic diversity of Nigeria and its diversity in terms of culture.
Explanation:
Nigeria is a diverse nation. It has many ethnicity that have overlapping and different cultural practices of their own.
These ethnicity all interact with each other in the modern world and are able to create modern cuisines along with their own traditional ones.
It is also to be seen that the nation was colonized by the British who had brought their own ideas of Cuisine that persist to this day.
The tea, the coffee and the dishes around toast have persisted.
The homegrown dishes made around Yam and meat of cattle have also persisted to this day and modernized.
