Which is NOT considered part of the fire triangle?

Which is NOT considered part of the fire triangle?
 
  A) Oxygen
  B) Combustion
  C) Fuel
  D) Heat

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(Question #2) Which characteristics describe the typical pyromaniac?
  I. White male
  II. Late teens
  III. High intelligence
  IV. Middle to high income level
 
  A) I, II, III, IV
  B) III, IV
  C) II, III, IV
  D) I, II

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(Question #3) Sam has set three fires at separate locations with no cooling off period between the fires. Which label best fits Sam?
 
  A) Mass arsonist
  B) Pyromaniac
  C) Spree arsonist
  D) Serial arsonist

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(Question #4) Which of the following motives for arson accounts for fifty percent of all arsons in the United States?
 
  A) Pyromania
  B) Profit
  C) Crime concealment
  D) Revenge