Sometimes people get caught in a “downward spiral,” a case in which something leads to a result which in turn leads to more of the original thing, bringing on more of the result. As the process continues, the result continually gets worse and worse. An example is when people turn to binge eating when depressed, which causes them to put on weight and feel unhealthy, which then makes them more depressed, leading to more overeating, and so on.

The author is mainly concerned with (Points : 1)
convincing people not to overeat
explaining the process of the “downward spiral”
showing how overeating can lead to depression
showing how some processes lead to surprising results
I think the answer is explaining the process of the downwars spiral!

Right!

I posted at the bottom what I think the answer is and I think that it is because that's all the sentence discusses!

Yes, you are correct. The author is primarily concerned with explaining the process of the "downward spiral." The passage describes how one thing leads to another, resulting in a worsening situation. The example given is of people turning to binge eating when depressed, which then leads to weight gain and feeling unhealthy, causing more depression, leading to more overeating, and so on. The focus is on understanding how this negative cycle perpetuates itself.

Yes, you are correct! The author is mainly concerned with explaining the process of the "downward spiral." The passage describes how a certain behavior, such as binge eating when depressed, can lead to negative consequences (putting on weight, feeling unhealthy), which in turn exacerbate the initial problem (depression), leading to a continuous loop that worsens over time. The focus is on understanding and illustrating this cycle rather than persuading people not to overeat or showing how some processes lead to surprising results.