Final answer:
A group of genetically diverse organisms is most likely to survive major changes in its environment.
Step-by-step explanation:
The population that would be most likely to survive major changes in its environment is a group of genetically diverse organisms. Genetic diversity increases the chances of a population adapting to new environments or resisting environmental changes. A group of a sexually reproducing organisms would have more genetic diversity compared to a group of asexually reproducing or genetically similar organisms because sexual reproduction introduces new genetic variations through genetic recombination and mutation.
Learn more about Survival of populations in changing environments