| __ | 1. | Biodiversity | | A. | A. The variety of life on Earth. |
| __ | 2. | Climate Change | | B. | E. Taking wildlife faster than it can reproduce. |
| __ | 3. | Coral Bleaching | | C. | C. Contamination of air, land, and water. |
| __ | 4. | Endemic Species | | D. | B. Destruction of natural habitats. |
| __ | 5. | Habitat Loss | | E. | D. Long-term changes in Earth's climate |
| __ | 6. | Overexploitation | | F. | G. The natural cleaning of water. |
| __ | 7. | Pollution | | G. | F. A species found only in one specific place. |
| __ | 8. | Reforestation | | H. | H. A tool that monitors Earth using satellite images. |
| __ | 9. | Satellite Imagery | | I. | I. Coral color loss due to ocean warming. |
| __ | 10. | Water Purification | | J. | J. Growing trees again in damaged forests |