为了帮助同学们更好的备考托福阅读，小编为大家整理了托福阅读的题型解读，希望对大家有所帮助噢。
It can be inferred from paragraph 4 that it was difficult for people to change from farming back to hunting and gathering because
people had become more used to different types of food
climatic conditions were no longer favorable for hunting and gathering
populations had become too large to be supported by hunting and gathering
the farmer's sedentary life was easier than the hunter-gatherer's nomadic life
【Paragraph 4】It would appear that the instability of the climatic conditions led populations that had originally been nomadic to settle down and develop a sedentary style of life, which led in turn to population growth and to the need to increase the amount of food available. Farming originated in these conditions. Later on, it became very difficult to change because of the significant expansion of these populations. It could be argued, however, that these conditions are not sufficient to explain the origins of agriculture.Earth had experienced previous periods of climatic change, and yet agriculture had not been developed.
解析：
推理题。此题选C。
此题定位到P4S3: It became very difficult to change because of the significant expansion of these populations。它很难从农业变回hunting and gathering的原因主要是因为人口的迅速扩张。而在它的前面谈到气候条件的不稳定性导致人口定居，继而人口增加和食物需求量增加，在这些条件下才出现农业。这说明人口增加，发展农业可以解决食物需求量的增加。反之hunting and gathering无法满足食物需求。
希望以上内容能对各位有所帮助噢!
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