What is most likely one of churchill's main purposes when giving his speech?

He wants to reassure the British people that entering the war is the best option for Britain.

Explanation:

Churchill's warnings about the threat of the new Nazi routine in Germany at first failed to receive any notice. In 1938 Britain and Germany nearly did battle over Hitler's craving to attach some portion of Czechoslovakia. Head administrator Neville Chamberlain traveled to Munich to anchor a certification that there would be no further German hostility. Churchill was incredulous of the arrangement of conciliation and communicate specifically to the United States, engaging for more noteworthy American association in Europe.

the answer is use of support  

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.