Bears _______ during wintertime due to cold weather and food scarcity.
Technically, there is some debate about whether bears can be described as true hibernators. They do enter a state of torpor, a deep sleep, but they do not experience the same drastic decline in body temperature as hibernators like chipmunks and ground squirrels, allowing them to react quickly if disturbed. However, bears can go for 100 days without needing to wake and are very good at slowing down their bodily functions to outlast the lack of food during winter. Some scientists describe them as super hibernators.
The correct answer is Sleep.