Does anyone know the answer to this and the reason why you choose that answer?

3 is your answer. When developing an embryo, fertilization of gamete cells is stage that it goes through .

1 .) Mitotic division

Explanation:

A zygote is the result of two haploid cells fusing together during fertilization. So if we start after fertilization has taken place we are lift with mitosis. 1 and 4 are left but 4 mentions differentiation of tissues which happens near adulthood and mostly later in life especially not in a developing embryo.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.