| A | B |
| ancestors | people in your family that lived a long time ago |
| consistent | always behaving in the same way, or having the same opinions, standard etc |
| previous | happening or existing before the event you are talking about |
| obligation | state of being forced to do something becuase it is your duty or because of the law. |
| external | happening outside a place, organization or particular situation |
| prohibition | the act of stopping something being used |
| necessity | the fact that something must happen or be done |
| privileges | special rights or advantages |
| inhabited | lived in a particular place |
| descendant | a person's child |
| minimize | reduce to the lowest possible level |
| evolved | developed gradually |
| prominent | large, standing out from, easily noticed |
| coordination | the organization of people so that they work efficiently |
| resourceful | good at finding ways of doing things |
| marginal | land that cannot produce enough good crops to make a profit |
| coexistence | living peacefully together in the same area |
| explosion | sudden increase |
| speculate | form an opinion about something without knowing all the facts |
| episode | one part of the story |