The thing that are common in the four pictures are:
What is the divergent plate boundary?
A divergent boundary is known to be called the divergent plate boundary and it is said to be a kind of a linear feature that can be seen to exist between two tectonic plates that are known to be moving far away from one another.
Note that Divergent boundaries found inside the continents often start to make rifts, which slowly become rift valleys. The formation of rift valleys as well as oceanic ridges tells us that the crust is tearing apart or spreading out.
Therefore, The thing that are common in the four pictures are:
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