What is the likely outcome for a population that has a larger proportion of young individuals compared to older individuals after a certain period of time?

The population will increase.

If a population has more young individuals compared to older individuals, it suggests that the population has a relatively high birth rate or influx of young individuals, and/or a relatively low death rate among young individuals.

In this scenario, after some years, the population is likely to increase. The reason for this is that the young individuals, with their higher birth rate, will eventually reach reproductive age and contribute to the overall population growth through their own reproduction. As a result, the population size will continue to expand.

Option (c) "It will increase" is the correct answer in this case.