The most likely threat that scientists think Australia has based on current climate trends is that of coral bleaching.
Answer: Option C
Step-by-step explanation:
The Coral Sea that lies to the east of the Australian continent is home to the world's greatest variety of corals. The Great Barrier Reef hosts about 2900 different reefs laden with species of corals.
These corals have been subject to starving as the colorful algae that these corals feed on are dying because of the consistent warming of ocean water in the region.