Which of the Following Would Not Be Considered an Example

Which of the following would not be considered an example of an ecosystem good or service?

A) Forests removing excess carbon dioxide from the atmosphere
B) Bees pollinating an invasive weed species
C) Bacteria metabolizing a substance that poses a health threat to humans or cattle
D) Blowflies limiting the population growth of an insect pest species
E) Marsh grasses limiting the effects of storm surges from hurricanes