Answer:
The correct answer is the cell specialize.
Step-by-step explanation:
A multicellular organism develops from a diploid zygote through a number of cell division as well as cell differentiation.
After development the cells of multicellular organism undergo specialization .During the course of development three germ layers are formed .They are termed as Ectoderm, mesoderm and endoderm.
Ectoderm gives rise to nervous system and skin, mesoderm give rise to cardiac muscle,skeletal muscle,red blood cells,smooth muscle and the inner germ layer endoderm gives rise to gastrointestinal system,respiratory system.