Answer:
The correct answer is option b, that is, mitosis and cell differentiation.
Step-by-step explanation:
A zygote refers to the outcome of fertilization. The diploid zygotes go through the process of mitosis and differentiation in order to generate the embryos. The differentiation of cells at the time of embryogenesis is essential for the cell, organ, tissue, and organism identity.
Once the process of fertilization takes place, that is, the fusion of sperm with the egg, the development of zygote takes place. The zygote differentiates into various kinds of cells by the process of mitosis, initiating the beginning of embryonic differentiation.