Answer:
The history of life shows that organism evolves with time as a result of changes in their surrounding environment.
The organism evolves to best fit in their changing environment with the mechanism called adaptation. These adaptation takes place due to mutation in their genes and is passed on to their offspring to become established in the population.
The adaptation is the driving force of natural selection which helps in the survival of the fittest organism to their niche. For example, the crocodile is reptile which still exists on this earth from the time of their origin in age of reptiles or Mesozoic era.
Thus, the adaption helps in the survival of the organism.