Asexual reproduction is a method in which new individuals are produced directly from the mother through the union of pairs of germ cells without the use of reproductive cells. Essentially, reproduction by somatic cells is asexual reproduction. The main types include: fission reproduction, spore reproduction, budding reproduction, vegetative reproduction (grafting, layering, cuttings, etc.), tissue culture and cloning, etc.

A. Grafting refers to grafting the buds or branches of one plant to another plant, so that the two parts combined grow into a complete plant. It belongs to vegetative reproduction and does not meet the meaning of the question.

B. Asexual reproduction is a reproductive method that produces new individuals from the vegetative organs (roots, leaves, stems) of the plant, also called vegetative reproduction; for example, potato tubers, thistle roots, strawberry creepers Branches and leaves of begonias can produce buds, and these buds can form new individuals.

C. The method of reproduction through the combination of reproductive cells of both sexes is called sexual reproduction;

D. Fission reproduction, also called fission, is the splitting of an organism from a mother to create new individuals. Reproductive methods. Commonly seen in single-celled organisms (division means reproduction), such as bacteria.

So choose: B