Answer:
Plants. Some Bacteria. Algae. These 3 are the photosynthetic autotrophs..
Why the others don't fit:
Athropods are hetertrophs. Not all bacteria are autotrophs. Only some protists are autotrophs.
Viruses are not made of cells, I believe.
Answer:
blue one
Explanation:
it is mutualism, because both of them benefit
Answer:
eukaryotic cells have a nucleus whereas prokaryotic cells do not