What do public polls and newsreels in the 1930s show about American concerns and priorities?

shows how it has changed and what people think and care about in the 1930s

Explanation:

the answer to your question is:

strong-mayor system

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.