The official national animal of Australia is the Kangaroo.
The Kangaroo which is hunted for meat and for sport, and used as a motif in the decorative arts, the kangaroo was finally recognized as an official symbol of Australia when it was included on the nations coat of arms in 1908.
The answer is: Kangaroo
C. the Spratly island and Taiwan claimed it
This is true.
The definition of megalopolis is that it is a large urban area, huge and densely populated. St. Petersburg is definitely one, however, Miami is relatively small compared to other megalopolises so it might not fall within that category.
Human health can be affected by changes in air quality mainly because if the air is bad they will have various health defects. For example with some of the cities in China much of the air there is polluted. Thus human health may be affected by added stress as well as breathing in polluted air which will cause side effects.
All in all human health is affected by changes in air quality because air is what humanity breaths to survive. If in some way this air were to be polluted we would suffer from decreased health due to a circulation of fossil fuels in our atmosphere.