Answer: A. the Coral Sea
Step-by-step explanation:
In the first image attached, arrow 4 shows the region of the body of water located in northeastern Australia and in the second image the answer: The Coral Sea.
The Coral Sea is located in the western Pacific Ocean, off the northeast coast of Australia. Its name is because in its waters is the Great Barrier Reef, which is the largest coral reef in the world and one of the most important ecosystems in danger of extinction. In addition, in this area there is a series of uninhabited islands that are called the Coral Sea Islands.