In research studies, when you execute scientific experiments, you always have the independent and dependent variables. Dependent variables are the parameters you want to measure or investigate. Independent variable, on the other hand, are parameters or events that you control or set. In this case, the dependent variable is the amount of collisions made by the two groups.
<u>The following best describes the demographics of Europe:</u>
- Low birth rate
- positive migration
- low death rate
<u>Explanation:</u>
Europe is a developed country and reached to a higher level of population dynamics. The population pyramid looks like bell in Sweden, Germany and Britain because the population between the age group of 20-35 years is high in these countries.
The total life expectancy is also high in these western countries due to modern medical facilities and technological development. Immigration is very common in this continent due to pull factors. Birth rate and death rate both are low here that's why it reached the target of zero population growth rate.
The answer is; people are motivated to seek reinforcement and avoid punishment.
<em>Hope this helped! :)</em>
