Plz help me answer this

Which of the following describes a boom period? a. as one population increases, another population decreases. b. as one population increases, the other population also increases. c. as one population decreases, another population increases. d. as one population decreases, another population also decreases

With the word calcite wich completes the analogy mineral, erosion, marble, or aragonite

The negative impacts of nonnative species generally outweigh the positive impacts