Im going to guess that you are asking why sea levels are rising??
The rising in sea levels is due to climate change. By burning fossil fuels such as coal or oil we produce green house gasses such as carbon dioxide which are causing the climate to become warmer. This is resulting in warmer seas and warmer winters meaning glaciers and huge amounts of snow and ice are melting. It is the melting of these that is causing a rise in sea levels.
Try evidence for catastrophic events in earths history
Sea-floor spreading is what happens at the mid-oceanic ridge where a divergent boundary is causing two plates to move away from one another resulting in spreading of the sea floor. As the plates move apart, new material wells up and cools onto the edge of the plates.
The four main regions of Brazil are, North<span>, </span>Northeast<span>, </span>Center-West<span>, </span>Southeast <span>and </span>South<span>.</span>