What is the primary role of political parties in helping citizens engage with the U. S government?

Political parties in the United States help citizens engage with their government "By informing the public and political issues and motivating them to take action."

porter is writing economic history because he is focusing on the cost of developing vaccines.

answer: (fluidity)is the correct answer.

explanation: because of this characteristic, success on the battlefield depends in large part on the ability to adapt to proactively change events to our advantage as well as to react quickly to constantly changing conditions