The body's physical and psychological reactions to situations people
perceived as threats defines what?​

Habit 1: be proactive  habit 2: begin with the end in mind  habit 3: put first things first  habit 4: think win-win  habit 5: seek first to understand, then to be understood  habit 6: synergize  habit 7: sharpen the saw 

Ican only answer your first question, a machine is like a human body because it's a little similar. they both almost work like the same.

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