Okay, here's a simple model framework for understanding plants and animals, suitable for an adult learner, within the token limit:

**Plant Model:**

*   **Input:** Sunlight, water, nutrients (from soil), CO2.
*   **Process:** Photosynthesis (using chlorophyll).
*   **Output:** Oxygen, glucose (sugar - energy source), growth (leaves, stem, roots).
*   **Key Structures:** Roots (absorption), Stem (transport), Leaves (photosynthesis), Flowers (reproduction).

**Animal Model:**

*   **Input:** Food (plants or other animals), water, oxygen.
*   **Process:** Respiration (energy production), Digestion (breaking down food).
*   **Output:** Energy, waste products (urine, feces), movement, reproduction.
*   **Key Structures:** Mouth/Digestive system (intake/processing), Lungs/Gills (respiration), Muscles (movement), Brain/Nervous system (control).

Both models highlight the fundamental needs (energy, water) and processes (converting inputs to outputs) necessary for life. Comparing them shows how plants produce their own food, while animals consume it.
