Answer:
Civics derives from the Latin word civics, meaning "relating to a citizen", and the Latin Civica, a garland of oak leaves worn about the head like a crown, a practice in ancient Rome whering someone who saved another Roman citizen from death in war was rewarded with the civica and the right to wear it.
Acensus is the procedure of systematically enumerating, and acquiring and recording information about the members of a given population.
