Read the excerpt from “Clara Barton’s Childhood.” There was, directly in front of the house, a small, circular, natural pond, fed by springs in the bottom and surrounded by a circle of hills forming a basin in which the little pond basked and slept through the summer, welcoming visitors who wished to escape the summer heat. But in winter it became a thing of beauty and a joy forever to the skater. From its sheltered position it froze smooth, even, and dazzling, and had no danger spots. Based on the descriptive details of the setting, what can be inferred about the pond?