Ground hog day is an annual tradition that takes place on February 2nd. The groundhog, also known as woodchuck or marmot, is the largest member of the squirrel family. groundhogs are herbivores, which means they only eat plants. their diet consist of plants, fruits, grasses, and even tree bark. these mammals eat all summer long. As a result, their bodies are prepared for hibernation during the winter. during the summer and fall seasons, groundhogs eat and take naps under the sun. For such small rodents, a groundhog can eat, approximately a pound of food in one sitting. stepping themselves in the summer and fall is crucial because they will not eat during the hibernation. Their body store, the food and fat reserves that they will use throughout their long winter naps there heartbeats slows from 80 bpm to 5 bpm. their body temperature decreases from 99°F to as low as 37°F. later in February, the groundhog will wake up from hibernation. as the legend goes, if the groundhog sees his shadow on February 2 therapy, six more weeks of winter.

How does the final sentence build on a key idea mention in the paragraph?

A. It reveals why groundhogs hibernate during the winter
B. It explains the legend behind the tradition of Groundhog Day
C. It explains why winners are so long after the groundhog day
D. It implies that Groundhog Day has nothing to do with the length of winter