| A | B |
| plateaus | high, flat areas |
| penisula | piece of land surrounded by water on three sides |
| delta | triangle-shaped area at the mouth of a river |
| wetlands | swamps or marshes that have water on or near the soil's surface |
| humid | means moist, or having a lot of water vapor in the air |
| adapt | means to change in order to better fit the environment |
| dam | a barrier built across a waterway to control the flow and level of water |
| producer | someone who makes or sells goods or services for consumers |
| consumers | someone who buys or uses goods and services |
| manufacturing | when producers turn raw materials into goods |
| specialization | is every step in making a product done by producers who only work on their part of the process |
| divison of labor | separating a process into steps done by specialized workers |
| scarcity | means there are not enough resources to provide a product or services people want |
| opportunity cost | is what someone gives up to get something else |