Answer:
<h2>Working out in a gym.</h2>
Explanation:
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.
You should give out all of the above to let them do their job in the best way.
If the ballerina wants to improve her leg extension, she should focus on both flexibility and muscle strength. These two should go together. Flexibility alone or the latter will not help improve extensions. Higher extensions are more dependent on the muscles of your legs.
Ask her teacher and friends for help preparing for the paper.