The answer is "variable-ratio schedule".
In operant conditioning, a variable-ratio plan refers to a calendar of fortification where a reaction is strengthened after an eccentric number of reactions. This timetable makes an enduring, high rate of reacting. Betting and lottery diversions are great cases of a reward in view of a variable ratio schedule.
<span>The Dep't of Housing and Urban Development (HUD), est. in 1966
</span><span>The Transportation Dep't, est. in 1967 were newly created deparments</span>
When one closes off an area to stop people or goods from entering or leaving a place this means that an embargo on goods is present. This is usually done when one doesn't want a nation to continue its economic relationship with other nations. When people are stopped from entering or leaving a place, this would mean that they are put under quarantine.
Explanation:
Sorry but I don't Understand question