Context: Sugar gliders live in the forests of Southeast Asia. They have two arms and two legs. They also have a thin layer of skin, called a patagium, stretched between their arms and legs.
Sugar gliders use the patagium to glide through the air from tree to tree. The 's limbs are adapted for gliding.
Figure: sugar glider.
Which animal's limbs are also adapted for gliding?
A. three-toed sloth
B. Russian flying squirrel
Choose the right answer from the options and respond with its letter.

B