Body structure: Animals can be classified based on their body symmetry (such as radial or bilateral symmetry) and body features (like presence of a backbone).
Reproduction: Animals can be grouped based on their mode of reproduction, whether they lay eggs, give birth to live young, or reproduce asexually.
Habitat and behavior: Animals can also be classified based on their habitat (land, water, or air) and behavior patterns (for example, carnivores or herbivores).
