<span>a. they did not co-evolve with the natural species and lack natural controls, like predators</span>
Answer:
spiders
Explanation:
While humans and many other species have red blood, due to the iron in their hemoglobin, other animals have different colored blood. Spiders(as well as horseshoe crabs and certain other arthropods) have blue blood due to the presence of copper-based hemocyanin in their blood. Some animals, such as the sea cucumbers, even have yellow blood.
I believe it is the second option
Eukaryota and most likely produces milk to feed its young
