Which of the Following Is an Example of an Ecosystem

Multiple Choice

Which of the following is an example of an ecosystem service?

A) the state provides free maintenance of highway medians keeping the landscape beautiful
B) bacteria live in a termite's gut allowing the termite to be able to digest wood
C) oceans act as a giant thermostat, interacting with the atmosphere and land to control Earth's climate
D) tropical forests are removed to provide suitable land for subsistence farming
E) sand dunes provide the perfect "front yard" as human development expands to the coastline