Artwork is something that can be shared even in tough times. It can bring hope when it seems like there is none. With artwork you can illustrate many things one of those things can be hope. This artwork is letting others know that even though they are quarantined, they are not alone and will never be.
The main reason is that the USA is in the Northern Hemisphere & Australia is in the Southern Hemisphere. It has all to do with the tilt of the earth as it revolves around the Sun. Summer happens in the hemisphere tilted towards the Sun, and winter happens in the hemisphere tilted away from the Sun.
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What may form in a large body of water such as a lake or ocean, is a delta
The answer to the item above is letter "C. surface". Surface waves are mechanical waves that propagate in the interface of differing media. These waves very usually have larger altitudes and longer wavelengths than the body waves.
