一英语语法问题？？？？

Question

The prospect of a scarcity of ,and competition for,the world's resources requires that we reexamine the way in which we relate to the rest of the world.
翻译：未来的世界资源的匮乏和对世界资源的竞争要求我们重新审视与别国的关系。
问题："The prospect of a scarcity of ,and competition for,the world's resources” 哪一个是主语，哪部分修饰哪部分？帮忙分析一下句子，多谢！！~~

Answer 1

供参考

这是更新的资料
亦即是较早前的答覆已经取消

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这句子的主语是
the prospect of a scarcity 中的 prospect
不用理会 competition

因为 and competition for 是‘插入成分’
英文叫parenthetical element

特点是由两个‘﹐’与句子分隔
这里即是指
The prospect of a scarcity of ,and competition for,the world's resources
中
﹐and competition for﹐是插入成分

在主语的位置附近
插入成分不是主语的一部分
不会影响’主语与动词‘的关系(subject-verb agreement)
所以动词是 requires (单数)
而不是复数

如果原句改为
The prospect of a scarcity of and competition for the world's resources
...
则构成了
A and B 结构的主语
即 prospect 及 competition

Answer 2

你好
The prospect of a scarcity of ,and competition for都不是主语
the world's resource才是真正的主语
正确语序,the world's resources requires that we reexamine the way in which we relate to the rest of the world，because of the prospect of a scarcity of the world's resource and a competetion for it.

把The prospect of a scarcity of,and competition for,提前的目的，是加强语气