The executive branch checks itself by

the legislative branch.

kennedy used a range of this to develop a 'flexible response' plan for any international crisis. “he also expanded the it was important, because it ordered the fall of khruschev.

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.