By the sentence given as an example, the attitude that is being criticized by Chief Seattle in The Earth is Precious is the attitude of not taking control of what happens in life.
When saying "wave the web" he is referring to create one of his own, not being part of an existing web made probably by others, like a "strand".
By taking control of your life, or anything in our lives, we cannot blame anyone but ourselves for what happens, we take responsibility for what happens and we are also capable of changing the way we are weaving any time we want.
I would say that, according to these lines from The Earth is Precious, Chief Seattle criticizes the white man's ways of not respecting the earth. The correct answer is C.
By saying that life is a web that the man did not weave, Chief Seattle is trying to show how bigger than us -humans- life, nature and the Earth are. We are just a tiny part of it, but we are definitely not the center of the Universe, like sometimes we believe. We can't control everything around us and sometimes the Earth speaks for itself with big natural disasters. We usually mistreat our world, our home, and have to be more conscious about it.
The white man's ways of not respecting the earth