The system senses changes in the internal and external environment so that the body can adapt to the changes.

i think that d. wind is the answer.   i missed the question when i answered a. currents.

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)

answer: i cant find your answer. do u have another way i can answer it for you : )

explanation: