Watch this video about the stresses on the body caused by carrying heavy backpacks. then design an investigation about the effect of carrying backpacks on students’ health using these steps of the scientific method: make observations or inferences ask questions construct hypotheses and make predictions test hypotheses analyze results your investigation can address any question you have about backpacks and student’s health that you choose.

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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)

option c is the correct answer.

not sure if this is what you'r looking for nnew= nold