Context: 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 ?
Options:
0. The knight made the puffs leave .
1. They went astray .
2. The other creatures went astray and struck that place .
3. None of the above choices .
Answer: 1