7. It is an area where the presence of water depends on the tides. A. Ecosystem B. Intertidal zone C. estuary D. Food web 8. They are the organisms that produce food from sunlight and inorganic substances. A. scavengers B. Producers C. Consumers D. Decomposers 9. They are organisms that eat food scraps and left-overs. A. scavengers B. Decomposers C. Producers D. Consumers 10. They are organisms that breakdown into simpler materials the remains of dead organisms. A. Consumers B. Producers C. scavengers D. Decomposers