The patent system:         a.   acts as a direct positive incentive.         b.   acts as a direct negative incentive.         c.   acts as an indirect positive incentive.         d.   acts as an indirect negative incentive.         e.   does not provide an incentive.

answer: a. the kind of population living in your neighbourhood.

the census explorer data tool by the us census bureau allows the user to zoom in on any neighbourhood within the united states and find the kind of people residing in that by race and age.  

the tool needs to needs to be used twice – once in order to find what type of people reside in a neighbourhood, and then to see the age groups of the people in the same neighbourhood.

answer; sensory adaptation;

it's d. out with the planting and harvest of the crops.

answerpublish a notice of the proposed rulemaking proceeding in the federal register;