The correct answer is B. Meiosis.
Meiosis is a type of cell division that results in four daughter cells each with half the number of chromosomes as the parent cell. This process is essential for sexual reproduction, as it allows for the production of gametes (sperm and eggs) with half the number of chromosomes as the parent organism.
In plants, meiosis occurs in the anthers, which are the male reproductive organs. The anthers contain pollen sacs, which are small sacs that produce pollen grains. Each pollen grain contains a single haploid nucleus, which is half the number of chromosomes as the parent cell.
When a pollen grain lands on a stigma, which is the female reproductive organ, it germinates and produces a pollen tube. The pollen tube grows down the style and into the ovary, where it fertilizes an egg cell. The fertilized egg cell develops into a seed, which contains a new plant embryo.
Mitosis is a type of cell division that results in two daughter cells each with the same number of chromosomes as the parent cell. This process is essential for growth and development, as it allows for the production of new cells to replace old cells.
Regeneration is the process of replacing lost or damaged tissue. This process can occur naturally, as in the case of skin healing, or it can be induced artificially, as in the case of organ transplantation.
Fragmentation is the process of breaking up a larger object into smaller pieces. This process can occur naturally, as in the case of rocks breaking down into smaller pieces due to weathering, or it can be induced artificially, as in the case of cutting up a piece of wood.