If you want faster replys or even replys at all, you need to give all the info.
A tectonic plates
Because the outermost part of earth is know as the lithosphere. The lithosphere is divided into a number of tectonic plates. These plates move and interact with one another, driven by conventional forces within the earth
B.The embryo attaches to the mother
They begin to form about 3.8 billion years ago
