Why does genetic variation increase the chance that some individuals in a population will survive?

The main reason why this is going to be ideal is there are different individuals within the population that will mate. They will have the right traits that will allow the rest of the people to survive. This means that the offspring of these individuals will have all of the necessary characteristics that will make it easier for them to live.

Those who will not have these desired traits will not be able to survive. This is why there are some people who have different immunities against the factors that can be seen in the environment. For the diseases and viruses that are available in the world right now, there are some who would be able to survive while some will not have the ability to go through it.