Answer: sensory adaptation.
Sensory adaptation it's when the sensitivity to a
stimulus decreases as a consequence of constant exposure to the stimulus.
When the stimulus starts, the neurons will begin firing action potentials. After a while in the same environment, you'll most likely have forgotten all about that sensation (in this case noise) even though the stimulus is exactly the same.
Geographic isolation could be caused by a number of environmental factors. If a population of people or species live on an island, amongst mountains, in difficult to navigate terrain, or deep into rainforest or forests generally these groups could experience geographic isolation. Geographic largely occurs if a population or group of people or animals live in a remote region of the world that has little access to others due to any number of geographic features.
Herodotus - Father of History; wrote history of Persian Wars
President Johnson initiated many programmes to help end poverty among the United States. Within them, one of the ideas was to create jobs and the other one was to simplify gaining higher education level for youths. President Johnson initiated also Social Security Act (1965), The Economic Opportunity Act (1964) and Food Stamp Act (1964).
Answer: realities of economic disparity became more apparent
Explanation:
When it became more glaringly obvious to people that the economic disparity between the blacks and the whites was quite much because the system was built on the foundation of oppressing some groups and keeping them poor and disenfranchised, more people in the civil rights movement became radicalized.
Up till then, they had believed that civil rights could be won legally and nonviolently became the system could be changed but after the disparity was noticed, a lot of people began calling for the system to be revamped entirely.
