The data used to construct a population pyramid is obtained by: a) taking a population census
b) looking at labour force in the country
c) studying the statistics of the number of the children
d) looking at the emigration statistical data

In the years after world war ii, which of the following caused many people from asian and african countries to migrate to europe? a. the end of the soviet union b. new economic opportunities after colonialism ended c. the religious freedom found in europe d. new laws allowing greater numbers of immigrants into european countries