During the final years of world war 2 in europe american and british bombing raids

post the grid otherwise i cant .

also it sounds like a math question not history.

the answer to fill in the blank in this question would be the word resource, it is defined as the money, material or people (since human resource is a very valuable good) that a company or a person has at disposition (meaning they can use the resource as they see fit), to be able to complete a task or achieve a goal.