The answer is:
Age
This is because if you are younger your body can't handle as much because it's not fully developed. Now older people can handle more because their bodies are fully developed.
Shiela is more likely, two jobs can make you stressed and Sheila has them. The others have either 1 prioritie or have friends to help them, Shiela does not.
<span>At about 10 age does the brain begin "pruning".because prunning occours between 3 and 16 age</span>
