Is characterized by one or more of three key symptoms, including extreme inattention, hyperactivity, and impulsivity.

I believe the answer is: Attention deficit/hyperactivity disorder

Attention deficit/hyperactivity disorder happened when our brain constantly experiencing irregular pattern of impulses.
People with Attention deficit/hyperactivity disorder would have a really hard time in focusing all their time and attention in doing one specific activity such as sitting down to study for exam, doing homework, writing a long report, etc.

Answer:

american political culture includes a plenty of focus views and preferences. not all westerns experience the same opinions, of course, but the large preponderance promises to these general ideas, including equality, justice, freedom, individualism, integrity, and difference.

explanation:

the united states is a democratic republic. residents elect representatives to governmental, nation, and local administration; those deputies create the regulations that command u.s. community. although emptiness in u.s. law needs it, in usage, the administrative system is ruled by executive factions.

Sector is best defined as (part).