But detractors maintain that the terraces could also have been created by geological activity, perhaps related to the geologic forces that depressed the Northern Hemisphere far below the level of the south, in which case they have nothing whatever to do with Martian water.
解答：whatever为形容词，修饰前面复合不定代词nothing ，后面不定式短语to do with Martian water作后置定语修饰nothing whatever。
I have nothing whatever to say. 我无话可说。
I know nothing whatever about it. 关于这件事我什么也不知道。
