Which of the following is benefitted from variation?

The difference in the characters of individuals from parents and other progenies is called variation.

Populations of organisms occupy well-defined niches in the ecosystem using their ability to reproduce. The consistency of DNA copying during reproduction is important for the maintenance of body design features that allow the organism to use its niche properly. However, due to some reasons, the niches can change beyond the control of the organisms.

In such circumstances, variation is beneficial to the species because it will help the organism to adapt better to the changing environment and have a better chance of survival over time.