Final answer:
The correct answer is Urbanization (b). Urbanization refers to the process of a population shifting from rural to urban areas. The number of homes doubling led to the growth of urban areas, which in turn created many jobs in the construction industry.
Step-by-step explanation:
The correct answer is Urbanization (b). Urbanization refers to the process of a population shifting from rural to urban areas. In this case, the number of homes doubling led to the growth of urban areas, which in turn created many jobs in the construction industry. This is a result of the increased migration from rural to urban settings during the Industrial Revolution and the shift from an agricultural to an industrial economy. The increase in urban population created a demand for construction jobs to accommodate the growing number of homes.