Why is it important to identify the purpose of a piece of writing?

So that the reader doesn't get confused when reading the text.Also it helps the reader know what they are about to read. If you had an article with no purpose you most likely would just be rambling on about some random subject. hope this helps best of luck :).

Explanation:

they would have to clean it very clean

the narrator is saying that the old lady made her feel uncomfortable. you know this because they say "i found that rather irksome", "perhaps it was her being so upright and trim", and "i don't think it was that, because i thought that quaintly pleasant." hope this !