It is partly genetically determined but lifestyle choices such as diet, exercise, weight, and smoking play a role as well.
206 beats per minute. For 14 year olds.
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Answer:
Lack of friends can be a result of reading signals incorrectly. Many people think other people don't like them, so they don't like them in return and thus it goes on and on and before you know it, you hate that person, before you've even spoken to them. ... Friendship favours the brave.
All work together to make the body function.