Why fundamental traits did linnaeus use to separate plants from animals?

Linnaeus distinguished plants from animals primarily based on fundamental traits such as their mode of nutrition and structural characteristics. Plants were classified as autotrophic, meaning they produce their own food through photosynthesis, while animals were categorized as heterotrophic, relying on consuming other organisms for energy. Additionally, Linnaeus noted differences in reproductive structures and growth forms, which further defined these two kingdoms in his classification system. This clear separation laid the groundwork for modern biological classification.