This is a personal question, which means that only you can answer it. However, I can give some examples that might help guide your work.
An example of a primary source that you might encounter in your own life is that of a news article. As this article is likely to be written by a reporter witnessing the events, it can be considered a primary source. On the other hand, an example of a secondary source would be a non-fiction book that talks about a historical event. This is because such a book would give a second-hand account of an event based on historical information.
The Korean war lasted about three years but the Korean Armistice Agreement only ceased-fire. It did not end the war.
Meaning that it did not end after three years. It was only announced recently as of 2018 that the war might possibly come to a close after I believe at least over 60 years.
The correct answer for the question that is being presented above is this one: "I think it should be E, since the household is giving directly to the government." <span>In this circular flow diagram, the flow direction that could represent personal income taxes corresponds to letter E.</span>