Environment, health and population are interrelated.
A strain means to like pull or stretch something to an extreme or damaging degree. So, when you sprain your ankle or something is when you do something strenuous to that body part that usually ends in pain (ouch). I hope this helps!
I think a parent's would communicate better with there kids as friends. because friends talk better with other friends because they are more open. As for kids and parent's they don't get along very well sometimes because the kid thinks the parent's are to bossy or whatever..etc.
Hope this helps
Death, of the user or somebody else. They are unaware of what is doing. Some illegal drugs can cause you have to have "super strength", Hallucinations, the "muchies", and several other side effects.
Hope I was able to help. :)