The correct option is A Binary fission
Binary fission is a form of asexual reproduction and cell division. This process results in the reproduction of a living cell by dividing into two parts that each have the potential to grow to the size of original cell.
In this diagram, the step of binary fission which we can see is where the genetic material is pulled to separate poles of the organism (in this case amoeba). After this step, new cell membrane will begin to form to separate the organism.
Thus, the correct answer is option (A), 'Binary fission'.