Alarval stage particular to the lophotrochozoa is called a

trochophore or trochosphere

Explanation:

All the species belonging to the trochozoan clade such as

a) annelids

b) sipunculans

c) nemerteans

d) entoprocts

e) molluscs and

f) echiurans

These phylas all together constitute the part of the Lophotrochozoa which has trochophore larvae in their life cycl. Trochophore (trochosphere) are free swimming and translucent  larva which possess characteristic of marine annelids mollusks. They have cilia which are hair like structure for movement.

From the above information it is clear that A larval stage particular to the lophotrochozoa is called a trochophore or trochosphere

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)

helicase, i think thats it