Across
- 3. to keep something as it is, especially in order to prevent it from decaying or being damaged or destroyed
- 5. no longer existing
- 6. a natural event such as flood, earthquake,etc.
Down
- 1. a set of animals or plants in which the members have similar characteristics to each other and can be breed with each other
- 2. the natural environment in which an animal or plant usually lives
- 4. in danger of being harmed,lost unsuccessful