| A | B |
|---|
| crucial | very important |
| adjust | make a change |
| survive | someone or something manages to stay alive through a hard time |
| source | the place where something starts |
| unpredictable | you cannot tell if or when it will happen |
| architects | people who design houses and other buildings |
| structures | another word for buildings |
| contain | to hold or include |
| retreats | turn back |
| shelter | something that protects or covers |
