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Across
  1. 3. - psychology
  2. 4. - drive
  3. 6. -extrinsic
  4. 7. - incentive
  5. 9. - tendencies
  6. 10. - intrinsic
Down
  1. 1. - homestasis
  2. 2. - motivation
  3. 5. - instinct
  4. 8. - theory