It means that it wants you to find the missing information they are asking for.
Well, using my limited knowledge, "cleaving" means to chop, break in half, split, etc. Twain means twice. So, perhaps it's like "you've broke my heart in half", something along those lines? hopefully this helps you.
Explanation:
Balu said that he has finished his work.
Answer:
My Answer
Explanation:
I think this poem is called a sonnet. <3