Understanding the Structure of a Lecture on Biodiversity
Listen to the following passage:
In today's lecture, Professor Lewis will discuss the importance of biodiversity in ecosystems. He will begin by explaining what biodiversity is and then he will delve into its three main components: genetic diversity, species diversity, and ecosystem diversity. After defining each term, he will highlight the significance of preserving these varieties for the health of our planet.
Following his explanation, Professor Lewis will provide examples of how loss of biodiversity can lead to ecosystem collapse, citing the extinction of bees and its impact on food production as a critical point. Finally, he will conclude with some positive steps that can be taken by individuals and communities to help protect and promote biodiversity.
Note: This question has been adapted from its original format to accommodate a reading-based version. In the official TOEFL exam, speaking and listening sections require verbal responses and audio prompts, which are not represented here. Please note that this adaptation may not fully reflect the nature or difficulty of the official exam. The audio feature for these sections will be available soon.
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