I think the answer is ears if Spain is supposed to be spin and war is supposed to be head
Answer:
eukarya
Explanation:
so long as that stands for eukaryotic
fungi is eukaryotic
other 2 are multicellular, and therefore eukaryotic
if u don't like the first explanation, the second one is process of elimination
archaebacteria is a kingdom, so it can't be that, same with plantae.
fungi isn't a bacteria so it can't be that either
only option remaining is eukarya
Next step, is to look more into it and explore the evidence.
I believe the answer your looking for is Scientific Theory