Answer:
You didn't seem to add who Alison is, but the answers give me enough to say which answer is correct.
Of course, there is a very large difference between feeling down and having a serious problem.
Not wanting to go back to school after summer break is completely natural and makes sense, it is just feeling down.
Feeling different from your friends is an issue that people often say isn't that bad, but it is, though rarely requires medical help.
Hearing voices is something that does require medical/professional help. This has a very high chance of being due to schizophrenia, bipolar disorder, and sometimes things such as lack of sleep, drug use, or extreme hunger. Hearing voices is the answer. These issues are serious mental health issues that will definitely need professional help.
Air pollution is usually with all the smoke from using fossil fuels, I would try not using them as much. Water pollution is usually from oil spills and garbage littered in water sources. Land pollution is a lot from landfills, we are using so much garbage it takes lots of landfills to hold them, I would start by recycling my recyclable products and using recycled products. {{{BTW this is not good 2 paragraphs, use more evidence and details and add more this is just some good ideas}}}
The saying is treat all guns as if they are loaded.
External or internal and an example is how you feel about yourself I think
Zidovudine the first antiretroviral drug, became availabale to treat HIV on febuary 4 i dont rember what year, hope that helps you out