Final answer:
The number of home building permits serves as a leading economic indicator, indicating a potential increase in sales for the lumber company.
Step-by-step explanation:
The number of home building permits serves as a leading economic indicator. Leading indicators attempt to predict the future direction of the economy.
In this case, an increase in the number of home building permits indicates a potential increase in home construction, which in turn suggests a potential increase in sales for the lumber company. Therefore, the owner of the lumber company decides to increase his inventory to prepare for the expected increase in sales.