The body utilizes ATP that is stored in the muscles to perform anaerobic exercises. ATP stands for Adenosine Triphosphate which is a complex organic chemical - the source of energy that keeps everything going. The ATP is used for many cell functions including transport work moving substances across cell membranes, mechanical work, supplying the energy needed for muscle contraction...
A warm soft place to sleep and a quiet environment. Maybe certain music can be a factor too.
C) Animal vector; Lyme disease ( it's spread by animals or bugs )
B) Direct contact; Staphylococcus ( could get it from touching someone that has it )
A) Sexual contact; Human papilloma virus
Good luck! (:
Answer would be dance. Dance has a more outlook on the body then these others would.
D. Coming back from drug addiction is always hard. Never pick the easy path when it comes to these types of questions.