The most expectable answer is socialization.
This term is used to describe the process in which people learn the values, norms, and beliefs of a particular society/culture.
Therefore, for this indian couple, their early and previously-arranged marriage is nothing unusual because they were taught that's the most common thing for (indian) people to do. And you, well, you were taught differently; probably: that is better to wait until you grow old enough, and are sufficiently independent, to support a household. So, you get a "cultural shock" by hearing about how this couple got married.
The first option, colonial elites representing the colonies
<span>Many intellectuals and many of those working in development believe that the size of the world's population and its accelerated growth is the greatest problem and the gravest threat to humanity. Clearly, the ratio of the number of people to the amount of food available has an impact on nutrition, but how do these two factors interact? At the end of the eighteenth century the British political economist Thomas Malthus speculated that population growth could soon surpass production and food supply. By the end of the twentieth century, this had not happened, but malnutrition was widespread.</span>
