Actually, the Allies adapted the strategy of island hopping in WWII because it saved lives, time, effort, money, ammunition, food, ships, and everything else. In taking only key islands, the other islands would be cut off from the Japanese mainland and basically all supplies and equipment. Island hopping also allowed the US to quickly go through the places without spending much time liberating each one. It help end the war sooner, and the US were able to complete their objective much more quickly.
The Allies adapted the strategy of island hopping in the PACIFIC war of 1945
The advantage of this strategy was that the Allies encountered less Japanese resistance. They were also able to obtain bases in order to BOMB Japanese cities that housed wartime factories.
I believe the answer is buying war bonds simply because It illustrates Lady Liberty stating money is needed. Money was needed to buy war bonds. Hope that helps.
