Ow lumber costs and lower prices on new homes is an example of:

a market economy

an interrelated market

a planned market

a fixed market

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.