The correct answer is: B. Meiosis
Synapsis is the pairing of homologous chromosomes during prophase I of meiosis. It is a critical step in the process of meiosis, as it allows for the exchange of genetic material between homologous chromosomes. This exchange of genetic material is essential for sexual reproduction, as it allows for the creation of new combinations of genes.
Mitosis is a type of cell division that results in two daughter cells that are genetically identical to the parent cell. Mitosis occurs in somatic cells, which are all of the cells in the body except for the reproductive cells. Meiosis is a type of cell division that results in four daughter cells that are each half the number of chromosomes as the parent cell. Meiosis occurs in the reproductive cells, which are the eggs and sperm.
Synapsis does not occur during mitosis, as mitosis does not involve the pairing of homologous chromosomes. Synapsis is a specific event that occurs during meiosis, and it is essential for the process of sexual reproduction.