What i dont get it explain
the second bit is more formal, " You're six years old, aren't you?"
because, the other sounds very demanding or imperative, like as if you have to answer the question. so, it has to be the second line.
Answer:
just write a narrative about a small story
Explanation:
Like in the sentence you wrote just do a story like a thing happend to you or something really explain: Write 5 sentence about what happend to you in your life