Food chains model energy flow through an ecosystem. Producers pump energy into an ecosystem from an environmental source, and this energy is then passed from one organism to the next.
Answer:
Hi! I think that it is D. I am not 100% sure on it though so I'm so sorry if thats
wrong. Hope this helps though!
11 Systems would happen to be
- Muscular
-Endocrine
-Circulation
-Lymphatic
-Respitory
-Integumentary
-Repreductive
-Urinary
-Digestive
