Why is agriculture revolutionary for humanity? How has it contributed to the development of civilization?

Taking root around 12,000 years ago, agriculture triggered such a change in society and the way in which people lived that its development has been dubbed the "Neolithic Revolution." Traditional hunter-gatherer lifestyles, followed by humans since their evolution, were swept aside in favor of permanent settlements and a reliable food supply.

Explanation:

the answer is b.2008 and 2012 were presidential election years.

answer; (a) he was a u.s senator for 38 years;