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Extinction is Forever

Species that are extinct have died out and are no longer present on Earth. Endangered species are plant and animal groups in danger of becoming extinct. Both endangered species and extinct life forms were abundant at one time. However, they suffered from world-⁠changing events that led to their decline. Scientists know A _______________________, died out 65 million years ago due to a catastrophic environmental event. Today, many of the environmental factors B _______________________, are a direct result of human behaviour and practice. Deforestation, pollution, and urbanization have environmental effects that only humans can correct or control.
People have an obligation to preserve the world's biodiversity and to protect today's endangered species. Yet, millions of dollars are spent each year studying extinct species. While it's true C _______________________ and marvel at the frozen carcass of an extinct wooly mammoth, should we continue to throw money into studying them? Wouldn't money be better spent saving species that still exist?
Humans are rapidly destroying natural habitats and forcing many plants and animals out of existence. The loss of even one species disrupts the balance of nature in a habitat. It can result in a domino effect D _______________________. We need to find ways to maintain and restore these habitats so E _______________________ . We need to put our resources both financial and intellectual, into saving the species F ______________________ and leave the extinct species where they belong  — in the past.

1.  that can be saved
2.  that we should not focus on such things
3.  that isolated plants and animal groups could grow
4.  that many species, including T. rex dinosaurs
5.  that people find dinosaurs fascinating
6.  that will cause other species to fail
7.  that threaten endangered species

Пропуск | A | B | C | D | E | F

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