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