Most of the North American continent is dominated by variations of the temperate climate. This type of climate is mostly occupying the interior of the continent. It is a climate type that has four seasons, relatively warm summers, snowy cold winters, and rainy springs and autumns. Even though this is most dominant climate in North America it doesn't mean that it is the only one, in fact there's few other climate types like the tropical wet in the southeast, mediterranean in California, polar in the far north etc...
Climate oscillation or climate cycles are a recurring oscillation within the global or regional climates and their fluctuations produce varying climatic cells and pressures often occurring on an interannual and multi annular basis.
On a decadal and millennium timescales.Current examples of the ENSO, Pacific oscillation, Antarctica, and arctic oscillation. like ENSO is characterized by flooding and drought conditions and the distribution of extreme conditions in the form of heat and cold waves.
Other cycles like the Piora oscillation, Little ice age, medieval warm period, retreating of glaciers and warming of the planet. All these cycles move on earth from the equator to tropics to temperate to polar areas and the continuous warming and cooling periods have altered the rate of spreading of the seafloor and oceanic basin.
Present warming has drastically created a major change in the evolution of species causing extinction and quick decomposition of resources. The release of carbon and methane gases over these years have raised the greenhouse effect at alarming rates.
Due to rapid urbanization fueled by trade, approximately 87 percent of people live in urban areas of Australia. The correct option among all the options that are given in the question is the first option or option "A". A large part of Australia is covered in jungle and so major cities are places where people flock the most.
