a) Slavery increased in the South due to the economic gain of cotton
Growing more cotton meant an increased demand for slaves.
The researchers found that the productivity of the more highly illuminated workers increased much more than that of the control group. They also found out that their productivity even improved when the lights were dimmed again. As a result, the researchers<span> concluded that it was not the changes in physical conditions that were affecting the workers' productivity. Rather, it was the fact that someone was actually concerned about their workplace.</span>
Answer:credit card,debit card,cheque,moneytransfer
Explanation:
The total number of unemployed people is the statistic.
Explanation:
The number of unemployed people is defined by the number of people who do not have a job but are actively seeking employment.
This also has a filter on the total population against the age limit below which it is not legally permissible to work.
So, considering all these filters have been met in the description of the statistic mentioned in the question it is easy to assume that this statistic is about the total number of people who are unemployed in an area or a country.
