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题目材料：
Agricultural historians theorize that farming originated when the pressures of growing populations or shrinking resources imposed the need to find new species to adapt for food. This hypothesis is supported by impressive work by anthropologists who have observed transitions to agriculture that happened in recent times. But, as an explanation for why agriculture arose in the first place, it seems ill matched to the facts of chronology. Extinctions--or even significant diminutions--in hunters' prey species cannot be shown to have happened in any of the right places at any of the right times. Populations certainly grew in the most dedicated farming cultures--but, in most places, more probably as a consequence than as a cause.
以上解析由 考满分老师提供。
