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>
Answer: Black cowboys have been part of Texas history since the early nineteenth century, when they first worked on ranches throughout the state. A good many of the first black cowboys were born into slavery but later found a better life on the open range, where they experienced less open discrimination than in the city.
Explanation:
The answer is a Natural Experiment.
A natural experiment takes place in natural settings and are used when independent variables can't be manipulated directly for ethical/practical reasons, so in this case the toddlers playing. Any effect observed happens naturally. They aren't seen as true experiments as the independent variable (toddlers playing) hasn't been changed deliberately to see effect on dependent variable (aggressiveness).
*uncle sam
*home of the brave
*melting pot
*land of the free
*the united states of america
*usa
hope that helps :)