Answer:
All are related to body composition.
Improved posture is one of the benefits to having good balance.
Even though not many people pay attention to posture, it can be quite important. If you have issues with your posture, it can lead to a lot of spine and back problems, so it is better to improve it while you can.
The statement about bipolar disorder which is true would be that periods of depression usually last longer than do periods of mania - b. This, however, is dependant on the person and whether/how he has been diagnosed and in which time of lie as it may vary.