Answer:
an interrelated market
Explanation:
An interrelated market shows the relationships between supply and demand of goods that might be substitutes, complements, or derivates.
When the supply or demand of a good affects the supply or demand if another good there is a correlation between these goods. In this case there is a derived demand because the production of lumber has a strong impact in the production of homes.
Another example maybe the change on prices of steel and the production of cars.
