I am pretty sure the answer is B) sedimentation but i could be wrong. i haven't don't this subject in a year. lol
Agriculture has an enormous effect on our society (and practically all societies for that matter) since it allows for a "food surplus"--meaning that people who are not farmers can develop other skills and trades that contribute to the advancement of society.
"Concealment" can be an antonym for "Exposition"
The person below or above me is correct