Which long term environment change may cause may cause animals adapted to cold weather like polar to survive and flourish

its Ice Age

Explanation:

An ice age is a long period of reduction in the temperature of the Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers. Earth's climate alternates between ice ages and greenhouse periods, during which there are no glaciers on the planet.

A

Explanation:

the answer is "a.) well–developed vascular system."

explanation:

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.