Few of the puffs still resided on Popstar but many left to who knows where . " Those poor lost souls ... " The knight thought to himself . He remembered falling ... falling from the sky .... The sky was so deep and dark blue ... the stars were falling . The other puff creatures were ' born ' this way , too . Metaknight remembered how they fell like stars .

Question: What may have caused the puffs to leave Popstar ?
Answer: The knight made the puffs leave .They went astray .The other creatures went astray and struck that place .None of the above choices .