A) binary fission
because it is a type of vegetative prpagation
genetic variability is not created in vegetative propagation

Genetic Variability and its Creation
Genetic variability is crucial for the survival and evolution of a species. It allows for adaptation to changing environments and the ability to overcome challenges. Let's explore the mechanisms through which genetic variability can be created.

Binary Fission
Binary fission is a form of asexual reproduction in which a single organism divides into two identical organisms. This process does not introduce new genetic material and therefore does not create genetic variability.

Mutation
Mutations are random changes in the DNA sequence that can lead to genetic variability. They can occur spontaneously or be induced by external factors such as radiation or chemicals. Mutations introduce new genetic information into a population, increasing variability.

Clonal Selection
Clonal selection is a process in which genetically identical individuals are produced from a single parent. This method also does not create genetic variability, as the offspring are exact copies of the parent.

Hybridisation
Hybridisation is the process of breeding individuals from two different species or varieties. This leads to the combination of genetic material from two different sources, creating genetic variability in the offspring. Hybridisation is a significant mechanism for generating genetic diversity.
In conclusion, genetic variability can be created through mechanisms such as mutation and hybridisation, but not through processes like binary fission or clonal selection. These mechanisms play a vital role in the evolution and adaptation of species in response to changing environments.