The monarch butterfly can be found in a wide range of areas across Canada and the northern United States during the spring and
summer. Monarch butterflies cannot survive the cold temperatures that occur during the winter in these areas
In order to survive the winter, monarch butterflies
A. burrow into the ground.
B. migrate to warmer areas
C. live underwater during the winter.
D. grow fur to keep them warm

In order to survive the winter, monarch butterflies "migrate to warmer areas".

Option: B

Explanation:

The survival for Monarch butterflies is not possible in any of the United States 'cold winters, therefore they are needed to migrate south and west every autumn to avoid the cold temperatures.This species migration usually begins around every year in October, but may begin quicker if the weather turns cold earlier than that.Thus they spend their winter hibernation all year round in Mexico and some areas of Southern California where the temperature is warmer. If the monarch stays in the Eastern states, typically east of the Rocky Mountains, then they will migrate to Mexico and hibernate in oyamel fir trees.