What change has occurred in Australia’s environment since 1788?

The selection of land utilized for agriculture and tourism as a significant change in Australia's environment since 1788 is accurate due to the substantial modifications that have taken place in the landscape over the past couple of centuries. Since the arrival of European settlers in 1788, Australia's environment has been dramatically altered by agricultural expansion to support farming, grazing, and other land uses. This has led to widespread clearing of land for crops and livestock, significantly impacting the natural ecosystems and biodiversity.

Tourism has also played a role in altering the environment, as natural areas have been developed to accommodate visitors, leading to both benefits and challenges in ecological conservation and management. These changes have transformed the natural landscape, facilitating economic development while also presenting challenges in terms of sustainability and environmental preservation.

In contrast, changes such as increased forest coverage or complete restoration of natural habitats have not occurred on a significant scale, and the notion of a reduction in human activity does not align with the extensive development and population growth in Australia since 1788. Thus, the correct choice accurately reflects the predominant trend of land use changes over the past two centuries.