Answer: oxygen
Explanation:
The medical condition described here is anaemia. It is a blood cell disorder whereby the red blood cell doesn't function properly and hence doesn't carry enough oxygen to the tissues. This is usually caused when ones body is deficient of iron.
The symptoms that may occur to such patients are weakness, fatigue, headache and pale skin.
Based on the explanation, the answer is oxygen
The answer is A. Transition
Divorce and changing schools is also considered a transitions.
An enviromental change could trigger a drug abuse for teens because it forced them to adapt (socialize with friends, etc)
Antidepressants are the most common medications prescribed to treat PTSD. Antidepressants make your brain release more serotonin and other 'feel good' chemicals that is in your brain's reward system. This is also released during things like eating your favorite food, Sexual relations, and exercise.
Examples of these are:
Zoloft
SSRI
Paxil
and much more...
I hope this helped. Have a great night!