Which of the following describes how plant and animals each contribute to the survival of the other in a cooperative relationship called interdependence?
a. Animals supply O2 to plants and plants supply CO2 to animals.
b. Animals supply CO2 to plants and plants supply CO2 to animals.
c. Animals supply O2 to plants and plants supply H2O to animals.
d. Animals supply CO2 to plants and plants supply O2 to animals.