How does Philip Pullman use imagery in The Amber Spyglass?

Examples of Imagery:

When you choose one way out of many, all the ways you don't take are snuffed out like candles, as if they'd never existed.

"But a complex web of thoughts was weaving itself in the bear-king's mind, with more strands in it than hunger and satisfaction. There was the memory of the little girl Lyra, whom he had named Silvertongue, and whom he had last seen crossing the fragile snow bridge across the crevasse in his own island of Svalbard. Then there was the agitation among the witches, the rumors of pacts and alliances and war; and then there was the surpassingly strange fact of this new world itself, and the witch's insistence that there were many more such worlds, and that the fate of them all hung somehow on the fate of the child."

"He went outside and found Lyra standing still, weeping, with Pantalaimon as a wolf raising his face to the black sky. She was quite silent. The only light came form the pale reflection in the snow bank on the remains of the fire, and that, in turn, was reflected from her wet cheeks, and her tears found their own reflection in Will's eyes, and so those photons wove the two children together in a silent web."