Two sides of it will never meet they will just go on forever hope that helps
Number 2 is mangrove forest. Number 3 is northeast coast of Queensland 4 is Victoria Australia and Tasmania
It can be one of two things.
First, it can be due to global warming.
Second, it can be due to the rotation of the sun. When the sun rotates, it can change it latitude causing it to hit at different points onto different areas of the world.
