Mrs. swift is alarmed by her own intrusive and irrational thoughts that her house is contaminated by germs. her experience best illustrates the agitating effects of

An obsession

Explanation:

 According to the given question, Mrs swift is alarmed by various types of her own irritating thoughts and the intrusive that her home are contaminated with the germs.

So, the given situation best illustrating the various types of agitating effect of an obsessions.

An obsession is basically refers to the fear disorder that contain the viruses, germs,dirt and the diseases. It is also known as the anxiety disorder where we unable to control our thoughts and behavior.  

 Therefore, Ab obsession is the correct answer.  

answer; i believe its called ; checks   and balances;

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.