D. Giraffes just started out with long necks and haven't changed. 6. The idea that each living species has descended with changes from other species over time is called A. descent with modification C. acquired traits B. struggle for existence D. artificial selection​

A. descent with modification.

Explanation:

I hope this helped you!!

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)