Your roommate can hear a hum from the air conditioner that you are unable to hear. this difference reflects the operation of

Absolute thresholds  is the right answer

Explanation:

The simple testing test follows a similar method for diverse sensory systems. Therefore the tester is usually present with a kind of stimuli that has different intensity levels. This remains the same up to the time when the observer feels or detects the availability of the incentives.

In those cases, the person is likely to undergo several trials before the researcher can determine the threshold point. The concept, therefore, is essential even though in reality it is not viable because e a person may fail to identify it.

d - failures.

the only attempted british colony in north america before 1600 was roanoke, virginia, which was a total failure. england claimed several areas, including newfoundland, but made no sustainable attempts to colonize them before 1600.

answer; incorporation;