What device did the chinese invent to meeasure the strengthvof earthquakes

Which of the following inventions most directly allowed ancient farmers to produce a surplus ?

According to ram mohun roy, in order to successfully move towards independence, indians had to? a.) convert to christianity. b.) hold firmly to traditional ideas. c.) take up arms against their british ruler. d.) change some of their culture and religious practices.

What were the shared risks of the signers of the declaration of independence were taking impending their names to the document?