Answer:
b. fetal
Step-by-step explanation:
The development of a new organism in the case of a human baby takes place in many developmental stages.
After fertilization, a zygote is formed by the fusion of two sex cells which divides by mitotic division and for, morula, blastula, and gastrula. These structures are called embryonic structures.
The phase of gastrulation starts differentiating the cells into different organs and the structure grows with different organs performing different functions. This stage is known as the fetus or fetal stage. Since the child in the womb has the organs to kick, a head and others therefore the child is in the fetal stage.
Thus, Option-B is the correct answer.