The correct answer is D.
The correct order of the most densely populated continents is : Asia, Europe, Africa, North and South America and Australia.
Africa has a population of 1.26 million and the population density of this continent is 87,15 people per square mile. Africa is experiencing the world's fastest growing population.
Asia is the most populated continent in the world with a population of 4,5 billion. The population density in Asia is 246,11 per square mile.
Approximately 7,6 billion people live on earth on seven continents.