Memory triggers when you study while saying chewing mint gum then you take the test while chewing mint gum you are more likely to remember things
        
             
        
        
        
The correct answer is the second answer: 
population increases. 
The demographic transition model describes how a population of a country transitions from high birth and death rates to low birth and death rates, as a country becomes more industrialized. This transition occurs through five stages (refer to attached image). In the second stage of the <span>demographic transition model, a country's population increases because birth rates continue to increase, while death rates fall considerably. </span>