Living and non-living things in an area and their interactions
Conditions an animal needs to grow and reproduce
Flow of energy from one organism to another in a food web
Cycling of nitrogen between soil, water, and the atmosphere
Scale
Resilience
Food webs
Boundaries
Kilometer
All of the above
Centimeter
Meter
Animals
Sunlight
Dead plants
Soil
the place where animals live
a collection of organisms and materials that interact
unchanging, fragile systems that are easily damaged
only found in forests