I need the options to help you out with the answers.
Answer: the author includes the exposition of a story to introduce the plot, setting, and characters
Dear diary,
The air quality was really bad today.
The air is filled with road dust and vehicle pollution. I envy Dilshad Garden. Compared to over here in Dwarka, the air is great there. Our area is the most polluted while there's is the least. It is so difficult to breathe with so much in the air. I can only hope I won't get follow up diseases.
(I hope this is enough? If not I can add more.)
-cassie