Read this passage from Through the Looking-Glass by Lewis Carroll. So the boat was left to drift down the stream as it would, till it glided gently in among the waving rushes. And then the little sleeves were carefully rolled up, and the little arms were plunged in elbow-deep to get the rushes a good long way down before breaking them off—and for a while Alice forgot all about the Sheep and the knitting, as she bent over the side of the boat, with just the ends of her tangled hair dipping into the water—while with bright eager eyes she caught at one bunch after another of the darling scented rushes.

To understand this passage, readers must be able to imagine

the plant Alice is gathering.
the clothes Alice is wearing.
the sheep from the shop.
the knitting project.