There are many developmental stages that a human undergoes between fertilization and birth. Immediately following which stage does
cellular differentiation begin?

W

Explanation:

Because when the sale starts invited it starts out as a singular cell, then divide itself into two and it continues to divide itself. So the answer that would make the most sense would be W because it starts out with only two.

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.