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Task 1: 1. B. destroy (The other words end with the /s/ sound, while "destroy" ends with the /ɔɪ/ sound.) 2. A. native (The other words start with the /h/ or /m/ sound, while "native" starts with the /neɪ/ sound.) 3. B. provide (The other words start with the /sn/, /r/, or /fl/ sound, while "provide" starts with the /pr/ sound.) 4. A. reserve (The other words have the /aɪ/ sound in the middle or at the end, while "reserve" has the /ɛ/ sound.) 5. D. wildlife (The other words end with the /əl/ or /ɑːl/ sound, while "wildlife" ends with the /laɪf/ sound.) Task 2: 1. C. destroy (The other words have the stress on the first syllable, while "destroy" has the stress on the second syllable.) 2. D. declare (The other words have the stress on the first or second syllable, while "declare" has the stress on the second syllable with a different vowel sound.) 3. B. reserve (The other words have the stress on the first syllable, while "reserve" has the stress on the second syllable.) 4. D. overuse (The other words have the stress on the first syllable, while "overuse" has the stress on the second syllable.) 5. D. essential (The other words have the stress on the first syllable, while "essential" has the stress on the second syllable.) Here are the completed sentences using the correct form of the word in brackets: 1. Conservation organizations work tirelessly to protect endangered species. (DANGER -> ENDANGERED) 2. The disappearance of certain plant species can negatively affect the balance of the ecosystem. (DISAPPEAR -> DISAPPEARANCE) 3. Efforts to restore damaged wetlands have been successful, bringing back native plants and animals. (RESTORATION -> RESTORE) 4. The destruction of rainforests is a major concern for the global environment. (DESTROY -> DESTRUCTION) 5. Human activities, such as deforestation and pollution, do harm to natural habitats of many animals. (NATURE -> NATURAL) 6. The study of ecology helps us understand how living organisms interact with each other and their environment. (LIVE -> LIVING) 7. The conservation projects aim to minimize the ecological damage caused by human activities. (ECOLOGY -> ECOLOGICAL) 8. Climate change and pollution can contribute to loss of biodiversity in the area. (LOSE -> LOSS) 9. Conservation efforts are crucial to protect endangered species and maintain a balanced ecosystem. (CONSERVE -> CONSERVATION) 10. Many species of animal are threatened with extinction. (EXTINCT -> EXTINCTION) Here are the completed sentences: 1. It is important to encourage environmental conservation and awareness. 2. The motivation for the control policy is to reduce the negative impacts of climate change. 3. Plants obviously do not have minds; nor do non-living things like tables and rocks. 4. Humans, dogs, elephants, and dolphins are all mammals, but birds, fish, and crocodiles are not. 5. Pollution can have disastrous effects on the delicately balanced ecosystem.