Which term is correct for one female arctic fox? biome species ecosystem organism

The answer is organism. One female arctic fox is an individual, an organism. A group of arctic foxes capable of mating and producing offspring is a species. The ecosystem is a group of interdependent organisms (such as arctic foxes and other species) and non-living factors they depend on. A biome is a region with different species with a common characteristics due to a similar climate.

It is evolution, because we all have some of the same traits like eye color or shape or ears.