The rivers of North America flow eastward or westward at the Continental Divide because it is situated along the highest points of the Rocky Mountains.
the Rocky Mountains have not yet experienced significant erosion.
the rivers mark areas of mineral deposits.
the environment was artificially altered to improve water flow to agricultural areas.

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)