The correct option is D Sloth
The circle here represents the 24 hours of a day. And, the circle is divided into 12 parts of equal size. In a day, we have 24 hours. So, we can tell that one part of a circle represents 2 hours. The sleep time shown here is for 9 parts of the circle which means it is 18 hours. A sloth sleeps for 18 hours a day. It spends 90% of its life hanging upside down on a tree, sleeping. So, the given chart is that of a sloth's.