Australia underwent a population boom because:
Australia was under the British 'empire' during the time. When the British prisons became overcrowded, many of them were shipped to Australia to live there. This increased the amount of people living in Australia exponentially, and eventually cities were founded
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Not really sure what your masking really?
Protecting the interests of native-born or established inhabitants against those of immigrants
Answer:
crossed beads for heavier and tougher cattle
Explanation: