和訳
Most of them are illegal immigrants from Mexico, a fact that helps explain not only California's recent strawberry boom, but also the quiet, constant transformation of the state's rural landscape and communities.
Meanwhile, the eastest-growing and most profitable part of California's farm economyーthe cultivation of high-value specialty cropsーhas also become the one most dependent on the availability of cheap labor. Nearly every fruit and vegetable found in the diet of health-conscious, often politically-aware consumers is still picked by hand: every head of lettuce, every bunch of grapes, every avocado, peach, and plum. As the demand (1) these foods has risen, (2) has the (3) of workers (4) to harvest them. Of the migrants in California today, anywhere from 30 to 60 percent, depending on the crops, are illegal immigrants. Their willingness to work long hours for low wages has enabled California to sustain its agricultural production, despite the loss since 1964 of more than nine million acres of farmland. Fruit and vegetables growers now rely on a flourishing black market in laborーand without it even more farms would disappear. Illegal immigrants, often criticized as welfare cheats, are in effect supporting the most important sector of California's economy.
(1)～(4)には、number,so,for,necessary が入るようです。
文中に出てくる“it”や“one” 等が何を指しているかを分かる範囲で構いませんので指摘して頂けると助かります(例えば2つ目のかたまりの文の1文目、“ーhas also become the one”の“one”等です)。
お願いします。
お礼
回答ありがとうございます。 おかげで役に立ちました。 また、お願いしますね(^^♪