What characteristic would best help bison survive a harsh, very cold winter? hoof size to be able to migrate to colder temperatures
hearing quality to be able to sense predators faster
thick fur to insulate the bison from the cold weather
leg length to be able to catch prey more easily

Thick fur to insulate the bison from the cold weather.

Explanation:

stratosphere: as the altitude increases, the air temperature increases. the stratosphere has a layer of ozone, called the ozone layer. this layer absorbs most of the ultraviolet radiation from sunlight. this results in the stratosphere being warmer.

i need an image of the diagram