1. In order for an ecosystem to remain stable there must be Х 1. drastic modifications (large changes) to the environment
Х 2. many relationships and lots of interdependence of the organisms living there
Х 3. very limited biodiversity (very few species that exist in the ecosystem)
X 4. gradual (slow) changes in the climate and the soil temperature

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)

if you listed your answers right then i believe your answer is b.