Among options, "working out in a gym" is the healthy activity.
What Sophia is trying to do is to encourage to a healthy activity, so going out to a bar, chewing tobacco and going to a party, those are not activities that lead to healthy results, but to alcohol and drugs consumption which attempts against any healthy habit. So, basically that's why "working out in a gym" is the right answer.
Obesity <span>is the most significant public health issue facing people in the U.S. today. The other categories has a low frequency to occur than Obesity.</span>
