Mood disorders in which the disturbance lies in only one direction are considered

The answer is a unipolar disorder.

Major depression also called unipolar or major depressive disorder, it is featured by a constant feeling of sadness or a lack of interest in the outside world. The unipolar signifies a distinction between the major depression and the bipolar depression that signifies towards an oscillating state between mania and depression.

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explanation: bc blah

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)