Why has it been difficult to find buried treasure on Cocos Island?"" is a more useful research question than ""Why did whalers stop visiting Cocos island?"" because —

Getting answers to the question about difficulties would involve interviewing historians in Costa Rica.

Explanation:

Before any answers can be factualized on the question, there will be the need to get some interviews with several historians in Costa Rica so as to get concrete report as well as factual first hand information on why it is difficult to locate buried treasures on cocos island, thereby giving room for more background research on the topic.

well its not not rising unemployment and falling inflation.

hope this good !

we need the diagram to answer this correctly.