Answer:
https://www.energy.gov/articles/history-light-bulb
Explanation:
Answer: one person
Explanation: The opening phrase is sung by one person before other voices enter and sing together.
Answer:
Untouchability is a social evil because the backward classes are denied the very fundamental rights, which are guaranteed to each and every citizen by the Constitution. ... Untouchability alienates people from the social structure and hinders the progress of the society as a whole
The answer is: attribution
attribution is the process of inferring the causes of events or behaviors.