In "To Da-duh, in Memoriam," describe one moment in the story when the relationship between the granddaughter and grandmother changes.

I think throughout this excellent story that narrates the
battle that occurs between Da-duh and her granddaughter, the most important moment and
the climax of the story comes when Da-duh shows the narrator the highest object on the
island in a last-ditch effort to try and prove that her world is superior to the New
York that the narrator tells her about. As she shows the tree to the narrator that
"appeared to be touching the blue dome of sky," and asks her if she has anything this
tall in New York, note the narrator's response:

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I almost wished, seeing her face, that I could
have said no. "Yes," I said. "We've got buidlings hundreds of times this tall in New
York."

It is after this, of
course, that Da-duh begins to ail and die, as "all the fight went out of her at that."
It is after this that she leads the way, and the narrator follows "triumphant yet
strangely saddened" behind, as she counts the cost of the bitter victory that she has
now won.