What is Alle saving her money to buy?

The correct answer is that Alle is saving her money to buy a huge, fancy bee hive. This detail points to her interest in beekeeping or possibly an environmental or agricultural project. The bee hive could represent a pursuit of sustainability or a hands-on hobby that contributes to pollinator conservation.

In the context of the other options, while a new smartphone, a collection of art supplies, or a remote-controlled drone may all be desirable items, they do not convey the same thematic depth or purpose associated with a bee hive. The focus on a bee hive suggests a unique passion or purpose beyond typical consumer goods, highlighting Alle's character and motivations within the story.