1. Sunlight: Sunlight provides the energy that drives the entire ecosystem. Plants use sunlight for photosynthesis, which creates food for themselves and ultimately for all other organisms.
2. Water: Water is essential for all living things. It's needed for processes like photosynthesis, respiration, and transporting nutrients.
3. Soil: Soil is the foundation of many ecosystems. It provides nutrients and anchorage for plants, and it's home to many decomposers that break down organic matter.
Let me know if you'd like to learn more about any of these!
