| A | B |
|---|
| disappear | to vanish, no longer be seen |
| drained | let all the water flow out of |
| endangered | in danger of all dying out |
| extinct | all of one type of animal or plant has died; there are no more ever |
| lack | not having something |
| plowed | to dig up the soil for planting |
| population | the total number of members of one group |
| sport | something you do for fun or exercise |
| tusk | a large front tooth or horn of an animal |
| wetlands | swamps, bogs, areas with land and water mixed together |
