According to the passage, a significant human impact on the Tasmanian environment first began..
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Option 3: "a little over 200 years ago with the arrival of British settlers."
Explanation: This option is correct as it aligns with the text, which states that significant changes to the Tasmanian environment began when British settlers arrived a little over 200 years ago. The text highlights that prior to this, Tasmania was largely untouched by human activity, indicating that the arrival of British settlers marked the beginning of significant human impact.
Option 1: "a little over 200 years ago and was caused by aboriginal people."
Explanation: This option incorrectly states that the significant human impact was caused by aboriginal people a little over 200 years ago. The text indicates that aboriginal people had occupied Tasmania for over 30000 years, and their impact was present long before the arrival of British settlers. Therefore, this option misrepresents the timeline and the cause of the impact.
Option 2: "some 30000 years ago with the arrival of aboriginal people."
Explanation: While it is true that aboriginal people arrived in Tasmania around 30000 years ago, the text does not indicate that a significant human impact on the environment began at that time. Instead, it suggests that their presence was marked by certain practices, but the significant impact referred to in the question is linked to the arrival of British settlers, making this option misleading.
Option 4: "some 30000 years ago with the arrival of British settlers."
Explanation: This option incorrectly combines the timeline of 30000 years ago with the arrival of British settlers. The text clearly states that aboriginal people occupied Tasmania for over 30000 years before the British settlers arrived. Therefore, this option misrepresents the historical timeline and the groups involved, making it incorrect.
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