These changes是主语
will be 是系动词
among the most wrenchings 是表语 后面是省略that的定语从句
your organization 是定从中的主语
ever undertakes是定从中的谓语.
【These changes主语】【 will be谓语】【 among the most wrenching表语,定语从句先行词】【(that/which关系代词省略) your organization ever undertakes】.(that/which关系代词省略) 【your organization 从句主语】【 ever undertakes 谓语】
祝你开心如意!