Nature

2. A biological community of interacting organisms and their physical environment.
4. The natural home or specific environment where a plant or animal lives.
7. The use of materials, coloration, or illumination for concealment by an animal.
8. The upper layer or "roof" of a forest, formed by the mature crowns of tall trees.
11. An arch of colors visible in the sky caused by the refraction and reflection of light in water droplets.
12. A giant sea wave caused by an underwater earthquake, volcanic eruption, or landslide.
14. A dense forest rich in biodiversity, found in tropical areas with consistently heavy rainfall.
16. A tapering structure hanging like an icicle from the roof of a cave, formed of calcium salts.
18. A seasonal prevailing wind that brings significant rainfall to regions like South Asia.
19. A thick subsurface layer of soil that remains frozen throughout the year, primarily in polar regions.
20. A giant redwood tree known for its massive size and extreme longevity.

1. A natural light display in the sky, typically seen in high-latitude regions (e.g., Northern Lights).
3. An event where the light from a celestial body is temporarily blocked by the passage of another.
5. The variety of different species of plants and animals living in a particular area.
6. A sugary fluid secreted by plants to attract pollinators like bees and hummingbirds.
9. A tree or shrub that grows in tropical coastal swamps that are flooded at high tide.
10. The seasonal movement of animals from one region to another, often for food or breeding.
13. An animal that survives primarily by preying on other organisms.
15. A status given to species that are at a very high risk of extinction in the wild.
17. A term for animals that are primarily active during the night rather than the day.