Which attracted settlers to the Willapa Hills coastal areas? beaches
wetland habitats
natural harbors
forests

Option A (beaches) is the correct option.

Explanation:

That several settlers wound up going to something like the coastal region of Willapa highlands owing to either the location of oysters. The above helped the town flourish as well as Oysterville would become the Pacific state capital throughout 1855.In San Fran, they sold oysters because they might demand huge sums of money for seafood. Subsequently, cranberry harvesting, dairy production to flourish because after oysters can't develop there as much as previously.  

The other options in question are not relevant to the particular circumstance. So option A is the proper option.