1. | the number of individuals in the pre-reproductive age group are more than the number of individuals in the reproductive age group. |
2. | the number of individuals in the reproductive age group are less than the number of individuals in the post-reproductive age group. |
3. | the number of individuals in the reproductive age group are equal to the number of individuals in the reproductive age group. |
4. | the number of individuals in the pre-reproductive age group are less than the number of individuals in the reproductive age group. |