Answer:
by first allowing there to be excess food supply. With extra food it caused a higher population, which then turned into people being able to trade in goods.Explanation:
New ideas cannot be copied
Pavlovian Conditioning, because it is off of Pavlov's dogs, who discovered that creatures can associate things subconsciously with other things (such as having a bad meal on a first date, you may now associate moldy food with that person).
Ur ans is D used more than one common name for the same organism
