B. The work once done by skilled workers was now done by machines and unskilled workers.
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Mass-production techniques and technology called for setting up huge factories with large work force. It created a lot of jobs but due to the division of labor, the skill requirements for a particular job were quite monotonous. Skilled workers were replaced by machines and unskilled machine operators that could perform a single task instead of an array of tasks.
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<span>The options were
a. applied research
b. field research
c. basic research
d. both a. and b.
The answer is C. basic research
Basic research is a research done because of our desire to know more, it doesn't necessarily have any consequences but only helps in expanding our knowledge on the aspect on which research is being done. Unlike applied research it cannot be directly applied to real world but only gives the required answers</span>
<span>The answer is "Aggression and competition".
Sociobiology, the deliberate investigation of the organic premise of social conduct. The term sociobiology was promoted by the American researcher Edward O. Wilson in his book Sociobiology: The New Synthesis (1975). Sociobiology endeavors to comprehend and clarify creature (and human) social conduct in the light of normal choice and other natural procedures.
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By completing with other nations and expanding boundaries
Answer:
A. regulation of the railroad industry
