Which of the Following Is an Example of a Local

Multiple Choice

Which of the following is an example of a local biogeochemical cycle?

A) O₂ released by oak trees in a forest
B) CO₂ absorbed by phytoplankton in the open ocean
C) excess NO₃⁻ converted to N₂ by denitrifying soil bacteria
D) phosphorous being absorbed from the soil by a corn plant
E) organic carbon remains of a leaf being converted to CO₂ by a fungus