daja999 daja999
  • 01-03-2017
  • Biology
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need help please.......

need help please class=

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StarArt101
StarArt101 StarArt101
  • 01-03-2017
Definitely not A, and most like not D either. 
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lacie2
lacie2 lacie2
  • 01-03-2017
The answer is B. Mechanical is movement. Combustion is like catching fire>heat.
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