Final answer:
We need to save the environment because of three main reasons: it provides us with natural resources, it gives us the essential elements for survival, and it maintains the balance of the ecosystem.
Step-by-step explanation:
The statement could be completed by saying that the third reason to save the environment is that it maintains the balance of the ecosystem. Our environment is a complex system where every creature and factor is interconnected and plays a distinct role. Its balance is crucial for the survival and well-being of all organisms, including humans. Disturbing this balance can lead to profound and often irreversible consequences, such as species extinction or climate change.
Hence, your thesis statement could be: 'We need to save the environment because it provides us with natural resources, it gives us necessary things to survive, and it maintains the balance of the ecosystem.'
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