Final answer:
The distinguishing abiotic features of the Australian outback include red dirt and blue skies.
Step-by-step explanation:
A distinguishing abiotic feature of the Australian outback is the red dirt. The outback is known for its vast stretches of arid land covered in rich, reddish soil. This distinctive characteristic is a result of the iron oxide content in the soil, giving it a reddish color.
Additionally, another distinguishing abiotic feature of the Australian outback is the blue skies. Due to its remote location and low levels of pollution, the outback experiences clear and uninterrupted blue skies.
Colorful corals and dung beetles are not characteristic of the Australian outback, making options C and D incorrect.
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