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动物物种灭绝

Animal species extinction
观点型大作文
🏷️ 观点型📋 ID: 091📝 词数 267

📝 题目

It is a natural process for animal species to become extinct. There is no reason why people should try to prevent this from happening. To what extent do you agree or disagree?

🤖 作文

It is true that extinction is a natural evolutionary process that has occurred throughout Earth’s history, such as the disappearance of dinosaurs due to natural climate shifts. However, I completely disagree with the view that humans have no reason to prevent animal extinction, as modern extinction rates are overwhelmingly driven by human activities and biodiversity loss threatens human survival itself.

First, the current wave of species extinction is far from a natural process. Scientific data shows that the present extinction rate is 100 to 1,000 times higher than the natural background rate, almost entirely caused by human actions: deforestation that destroys habitats, industrial pollution, overhunting, and human-induced climate change. For example, the baiji, or Yangtze River dolphin, was declared functionally extinct in 2006 due to overfishing, river pollution, and heavy shipping traffic in the Yangtze, rather than natural evolutionary selection. Allowing these man-made extinctions to continue is essentially taking responsibility for destroying the planet’s biodiversity.

Second, preventing animal extinction is critical to human wellbeing, as all species are interconnected within ecosystems. The loss of even one species can break food chains, disrupt ecosystem services such as pollination, water purification, and pest control, and eventually cause cascading crises for humans. A clear example is the dramatic decline of bee populations in recent decades: as key pollinators for 75% of global food crops, their extinction would lead to widespread crop failure and food shortages that directly threaten human populations.

In conclusion, while natural extinction does exist, most modern animal extinctions are human-caused, and preventing them is both an ethical responsibility and a necessary action to protect human own survival.

结构拆解

审题分析
这是雅思大作文典型的"观点类(同意/不同意程度)"题目,核心辩题是"动物灭绝是自然过程,人类没有理由阻止"。这类题目的写作需要明确给出立场,不能模棱两可,写作结构建议采用"开头亮明立场-2个主体段论证-结尾总结"的经典结构。
让步部分
先承认确实存在自然灭绝(如恐龙因自然气候变化灭绝),体现论证全面性。
第一个分论点
反驳题干中"灭绝是自然过程"的前提——现代灭绝绝大多数是人类活动导致,速率远高于自然本底速率,用白暨豚的具体案例支撑,说明不阻止是人类在推卸破坏责任。
第二个分论点
反驳题干中"没有理由阻止"的观点——阻止物种灭绝和人类自身利益直接相关,用生态系统连锁反应、蜜蜂与粮食安全的案例,论证生物多样性损失最终会威胁人类生存。
逻辑衔接
使用"However, First, Second, For example, A clear example is, In conclusion"等逻辑连接词,保证论证连贯性;案例均来自公共常识,符合题目"结合自身知识/经验"的要求。