Task: Question Generation
Input (English): Context: So , I set to work , clearing and cleaning a space , and setting up the tank . At the end of the day , my personal menagerie had grown by one puzzled little tortoise . His personal space has grown a lot larger , and one wall of the tank was made from a mirror , so there 's even a bit of company .
Output (English): What may be the reason the tortoise 's space got a lot bigger ?