Which of the following sequences correctly orders these regions from largest to smallest, according to their populations? a. north america, europe, east asia, south asia b. south asia, europe, east asia, north america c. east asia, south asia, europe, north america d. europe, east asia, north america, south asia

In the order of decreasing population size, the regions are:

C. east Asia, south Asia, Europe, north America

East Asia has a very high population density due to the immense population residing in China. South Asia is close by in terms of population with countries such as India falling in this region. Then comes Europe and finally north America, a large portion of which is inhabited due to the hostile cold conditions.