They help each other survive in the ocean. The fish help the sea anemone more though.
They store energy for the body cells with the difference that carbohydrates give the cells short-term energy while lipids give them long-term energy, meaning it takes more time for that energy to be lost
If two populations of birds stop interbreeding because of a difference in song patterns this would be described as behavioral isolation.
I would say C Duplication since both of the DNA sequences are identical.
