图片有Apple Grape Banana Elephant Pigeon Leopard

Thank you for providing more information. Based on the given objects, I would design the following class hierarchy:

Animal
├── Elephant
└── Leopard

Fruit
├── Apple
├── Grape
└── Banana

Bird
└── Pigeon

In this hierarchy, `Animal`, `Fruit`, and `Bird` are abstract base classes. `Elephant` and `Leopard` are concrete subclasses of `Animal`, `Apple`, `Grape`, and `Banana` are concrete subclasses of `Fruit`, and `Pigeon` is a concrete subclass of `Bird`.

This hierarchy reflects the common characteristics and behaviors of each group of objects. `Animal` has common properties such as habitat, diet, and behavior, and it makes sense to group `Elephant` and `Leopard` together as they share those characteristics. Similarly, `Fruit` has common properties such as taste, nutrients, and usage, and it makes sense to group `Apple`, `Grape`, and `Banana` together. `Bird`, on the other hand, only has one concrete subclass `Pigeon`, but it still makes sense to group it separately from other objects.