The correct answer is B. An increase in the number of wars
Step-by-step explanation:
The term "population growth" refers to the increase of the people that live in a specific zone such as a country or in the world. This is attribute to certain factors that include better social conditions such as better health services and more employment; more economical resources in families or conditions that motivate families to have children; immigration and migration movements; reduction in mortality; among others that guarantee people live more, more children are born or a population concentrates in one zone. However, in the case of an increase in the number of wars, this is not a factor that contributes to population growth as most wars involve risk and human losses and these only decrease the population along with other factors such as pandemics. Therefore the factor that does not contribute to population growth is an increase in the number of wars.