托福阅读修辞目的题是阅读考试中比较常见的一种题型，tpo则是托福阅读备考最权威的材料 ，所以托福小编综合二者，为大家集中整理了tpo阅读中考察的修辞目的题及其对应的解析，供大家参考使用。本文带来的是TPO11-3的修辞目的题，一起来看看吧。
TPO11-3 Begging by Nestlings
Paragraph 6：
As these experiments show, begging apparently provides a signal of need that parents use to make judgments about which offspring can benefit most from a feeding. But the question arises, why don't nestlings beg loudly when they aren't all that hungry? By doing so, they could possibly secure more food, which should result in more rapid growth or larger size, either of which is advantageous. The answer lies apparently not in the increased energy costs of exaggerated begging—such energy costs are small relative to the potential gain in calories— but rather in the damage that any successful cheater would do to its siblings, which share genes with one another. An individual's success in propagating his or her genes can be affected by more than just his or her own personal reproductive success. Because close relatives have many of the same genes, animals that harm their close relatives may in effect be destroying some of their own genes. Therefore, a begging nestling that secures food at the expense of its siblings might actually leave behind fewer copies of its genes overall than it might otherwise.
11. In paragraph 6, the author compares the energy costs of vigorous begging with the potential gain in calories from such begging in order to
○ explain why begging for food vigorously can lead to faster growth and increased size.
○ explain how begging vigorously can increase an individual’s chance of propagating its own genes
○ point out a weakness in a possible explanation for why nestlings do not always beg vigorously
○ argue that the benefits of vigorous begging outweigh any possible disadvantages
解析: 首先根据问题中的比较定位至第四句，说such energy costs are small relative to the potential gain in calories，先把所在的句子读清楚，说这种夸张的begging会对其他的sibling造成伤害，进而伤害到整个群体，所以答案是C，给出一个鸟夸张begging的缺点。A说了但不是目的;B没说D说反
[6]这些实验表明，乞食行为很明显为鸟父母提供了一个判断谁能吃的最多的需求信号。但是问题又出现了，为什么雏鸟不在它们不饿的时候大声乞食呢?如果它们这么做，就可以保证更多的食物，也就能更快的成长或者拥有更壮的身体，怎么说都是有利的。这个问题的答案显然不是因为过分乞食会消耗更多的能量——损耗的能量相比于其潜在能得到的热量来说只是很小部分——而是因为任何这么做成功骗取食物的雏鸟会带来跟它们拥有相同基因的同伴们造成危害。
以上就是托福阅读TPO11-3中的修辞目的题及其解析，大家可以在备考的时候参考复习，希望能够帮助大家的考前准备。最后前程百利祝大家都能取得理想的托福考试成绩。
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