I believe it's the ovule.
A part of the definition of binary fission is "splitting in half." It is an asexual form of reproduction, one turns in to two. This is choice B.
All of the characteristics of life, hope I’ve helped ;)
The process of the development of reproductive cells in males is called Spermatogenesis. Spermatogenesis develops immature germ cells into mature sperm cells. Oogenesis is the process of the development of reproductive cells in females. Fertilization happens when the sperm and egg cells unite.