D. Exfoliation is the answer
Characteristics of the photic zone in the freshwater biome are the warmer water, light, rich in freshwater organisms, shallow.
The photic zone is the first zone from the top of the freshwater body of water. It is the shallowest part of the body of water, and it is further divided into the littoral zone and limnetic zone. This zone is the closest to the shore. The sunlight manages to penetrate in it, so it is a zone where the majority of the producers are able to survive and thrive because they can perform the process of photosynthesis. Since this zone enables the producers to thrive, and the producers are the basis of any ecosystem, it enables the further existence, high diversification, and thriving of all the other living organisms in the freshwater biome. The photic zone is also characterized with warmer water because it is on the top, it is heated by sunlight, so that provides nice conditions for the living organisms to be the most abundant in this zone.
This "mild" climate allows the tourism to benefit because more people come to vacation. A mild climate, which can be also described as an ideal climate is perfect for tourism, as there is not one single season in which tourists could come, but it is a year long season, where tourists are always anxious to come and see the beatiful country of Georgia.
Austria-Hungary was a nation of many different nationalities. If each ethnic group became an independent nation, there would be no more Austria-Hungary. Therefore, the nationalists were a threat to Austria-Hungary because if they took action, the empire would fall apart.