Magma in the Earth's mantle moves in convection currents. The hot core heats the material above it, causing it to rise toward the crust, where it cools. The heat comes from the intense pressure on the rock, combined with the energy released from natural radioactive decay of elements.
I really wanted to know that also :)
The correct answer is - D. the Great Australian Bight.
The Great Australian Bight is a body of water that is located south of the Australian mainland. It is spread in most of the southern coast of the continent, and in general it is a shallow body of water that looks like it is penetrating into the continent because in this part Australia has an inward half circular shape. Because it is mainly shallow body of water, and the coast in this part is mostly flat, it is not a place that is suitable for creating ports.
OK so the best choice to pick from will be C because it is *Regional* not Global ^_^ and they really have no connection to each other.<span />
