Question

read the text.
when a person ingests caffeine, whether in the form of a cup of coffee or tea, a caffeinated soda, or even a piece of dark chocolate, the drug begins to take effect almost immediately. first, caffeine enters the bloodstream through the membranes of the stomach and small intestine. it is then metabolized by the liver, which breaks it down into other chemicals. within fifteen minutes of consumption, most people begin to feel the effects of caffeine, which can include increased heart rate and feelings of alertness or well-being. within six hours of consumption, about half of the original dose of the drug will have been eliminated from the body. this is why some people drink a second cup of coffee in the afternoon.
which organizational structure does this text primarily use?
problem - solution
sequential

Explanation:

The text describes the process of caffeine ingestion in a step - by - step manner. It starts with caffeine entering the bloodstream, then being metabolized by the liver, followed by the effects within fifteen minutes, and finally the elimination within six hours. This is characteristic of a sequential (chronological) organizational structure as it presents events in the order they occur. There is no problem - solution structure here as no problem is posed and then solved in the text.

Answer:

sequential