I want to know the answer to the following question:
What notable resource was available in the Marshall Islands?
All the background I'm provided with is that "It has been speculated that the crisis over the Carolines with Spain, which almost provoked a war, was in fact "a feint to cover the acquisition of the Marshall Islands", which went almost unnoticed at the time, despite the islands being the largest source of copra in Micronesia.". Is that enough to answer the question?