"A Rapid Challenge" and "Those Three Bears" develop this theme: The natural world is a source of surprises. Underline one sentence from each passage that shows the source of each surprise. Frankie squinted as her eyes followed Once, while I was sitting in an oak tree the line formed by Emily's pointing finger. When she finally saw what Emily was showing her, she gasped. It was a mother wolf and two tiny wolf pups. The mother was peering out from behind a tree as the pups batted at each other's faces under the mother's legs. "She has probably been teaching her pups to hunt here by the river," whispered Emily. "Maybe even showing them how to catch fish!" Frankie smiled to herself, imagining those wolf pups splashing around in the water, pawing at fish. Just then, her eyes met the mother wolf's. hoping to see a pair of pine martens that lived nearby, I heard the whining grumble of a bear, and presently a small bear ambled into the clearing beneath the tree. He was little more than a cub, and I was not alarmed. I sat very still, waiting to see what the bear would do. He put his nose to the ground and sniffed his way along until he came to a large anthill. Here he began huffing and puffing, blowing rapidly in and out of his nostrils so that the dust from the anthill flew in all directions.