1. a person is a creature that is the requirement. The demand for a reason is the influence or motivate behavior. The requirements that have not yet been received. Responsiveness is the incentive. Best of the requirements have been fulfilled, the incentive is not a reason anymore.2. the requirement of a person by a demand focus from basic to complex needs.3. when the minimum order requirements has been to tie answer. People are stepping up to a higher order needs further.
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