Which of the following describes a boom period?%0D%0A%0D%0A%0D%0AAs one population increases, another population decreases.%0D%0A%0D%0AAs one population increases, the other population also increases.%0D%0A%0D%0AAs one population decreases, another population also decreases.%0D%0A%0D%0AAs one population decreases, another population increases.

As one population increases, the other population also increases.