Beneficial variations refer to any changes in genetic composition or phenotype that provide an advantage to an organism in surviving and reproducing in its environment. These variations can increase an organism's chances of survival, reproduction, and passing on its genetic material to future generations. For example, a mutation in the gene responsible for producing an enzyme that degrades a toxic compound may provide an organism with a survival advantage in a polluted environment.
When beneficial variations accumulate in a population over time, it can drive the process of evolution and lead to the development of new species with unique traits and adaptations.