Answer:1. Introduction of harmful chemicals to the water system. - Pollution2. Unknown regions of the ecosystem which my harbor unknown species. - Cryptic Habitat3. This cause affects the development of plants and animals as in stunted growth. - Pollution4. The area near the crater of Mayon Volcano cannot support vegetation. - Geological Transformation5. Native mudfish has decrease in population because of the introduction of more sturdy foreign species. - Introduction of Alien Species6. Alligator skins are being used for the manufacture of belts and bags. - Overexploitation7. More intense typhoon has resulted to death of species. - Climatic Oscillations8. Elephants are being killed for their ivory tusks - Overexploitation9. Warm climate supports the growth of parasite and bacteria - Disease and Parasitism10. Humans are employing slash and burn to clear some natural habitat to convert to agricultural lands. - Habitat Destruction