Answer:
Cornfield in Kansas – Provision of Natural Resources – The cornfield in Kansas provides a natural resource in the form of corn, which can be used as food or converted into biofuel.
Bacteria that decompose waste along the Gulf Coast – Waste Management – The bacteria break down organic matter, helping to reduce the amount of waste in the environment.
Ocean currents that keep Pacific Northwest air cool and moist – Climate Regulation – The ocean currents help to regulate the temperature and humidity of the air in the Pacific Northwest.
Flower garden at a national landmark – Aesthetic Value – The flower garden provides an aesthetically pleasing view for visitors to the landmark.
Lumber from an oak tree – Provision of Natural Resources – The lumber from an oak tree is a natural resource that can be used to make furniture or other items.
Animals that eat seeds then spread the seeds through their waste – Pollination and Seed Dispersal – The animals help to spread the seeds of the plants, aiding in pollination and dispersal.