Which geographic feature prevents many Australians from living too far inland

Cold ocean currents off the west coast means there is little evaporation to form rain clouds, while the Great Dividing Range that runs down Australia's east coast prevents rain from penetrating far inland.

Credits - National Geographic

first, the romans stayed isolated because they had to defend their own territories from neighboring cities that were harassing them, like the etruscans. second, once the romans managed to defeat their neighbors, and started to expand their territory, they started to build roads and bridges. finally, now that the romans have covered their territory with roads functioning as highways, they could mobilize their legions faster to assemble larger military units in a specific place

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