Icefish live in very cold waters (-1.8 degrees celsius) where temperatures are below blood's freezing point. which statements are true about icefish adaptations for cold water?

I found following two statements true for why ice fish live in cold environment.

A. Ice fish have antifreeze proteins, it inhibits blood from freezing.

B. Ice fish do not have red blood cells, which reduces the viscosity of blood, allowing it to flow more freely at cold temperatures.

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)

"a.) well–developed vascular system."