As the exercise explains, what is known as political culture is the Americans' fundamental beliefs about human nature, society, economic relations, and the role of government. In other words, a political culture is a net of attitudes and practices held by people that molds and shapes their political behavior. This could be, for example, any moral judment or beliefs, ideas, theoris of what should compose a "good" society.
Voting is an essential power because we as the people decide on who we want as our government. A random person who gets elected if there was no voting could have bad intentions. Its a right we have also its a 9th amendment