"Animals in the polar regions adapt by having ________, which helps them blend into their environment, and a layer of ________, which insulates them against the cold. They also possess ________ paws that assist in walking on snow and a keen ________ to detect prey."
1
bright colors, thin skin, small, sense of smell
2
white fur, fat, large, sense of hearing
3
dark fur, muscle, sharp, vision
4
white fur, fat, wide, sense of smell