With the advent of industrialization and urbanization, maintaining the family pattern becomes more difficult in societies. Increasingly, young people move from rural to urban areas in search of employment in the industrializing sector of the economy. At that time, the family typically becomes the predominant family pattern in the society.

Extended; Nuclear

Explanation:

Urbanisation

This is simply known as development and growth of towns and cities. The idea is Urbanisation is the movement of population away from villages living to larger communities in towns and cities. The idea of industrialization as a means by which machines are often used in the production of goods.

Nuclear family

This a a type of family that comprises of a couple that is husband and wife and their children

Extended family

This is refered to as a type of family family that comprises of a couple that is husband and wife,their children and including grandparents, aunts, uncles, and other relatives. It goes beyond the nuclear family.

The 'fit' thesis

This simply gives us a clue that industrialization and urbanization contribute significantly to changes in the family and household. The fit thesis do shift the family structure. It shift it from mainly extended family organisation to one dominated by nuclear families.