The center of a mid-ocean ridge is where Choose one: a) two continental plates converge. b) new oceanic lithosphere is being created. c) the oldest and densest oceanic crust is found. d) molten basalt subducts into the mantle.

The mid-oceanic ridges are the contrasting geological landforms that are present in the middle of a divergent plate boundary. When two plates move away from one another, the hot and less dense magma rises upward, as a result of which the crust becomes thin and hot and eventually the magma erupts at the seafloor. The new materials are added to the oceanic crust along this ridge and the rocks that are formed here are geologically the youngest.

Thus, the center of the mid-oceanic ridges are found in the region where new oceanic lithosphere is formed and these ridges are the key features of a divergent plate boundary.

hence, the correct answer is option (B).