Crop rotation is important because
Some plants use a lot of nitrogen.
It increases soil fertility.
Repeated planting of the same crops decreases soil quality
All of the above.

i believe that the answer is c.

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)

i think that it is c, d, and e, hope this