4. In one to three paragraphs, describe dynamic changes that have occurred in the ecosystem you chose. Consider whether your ecosystem is degraded, restored, or neither, and list organisms that were once in the ecosystem but are no longer there.

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger