The lizards go for winter sleep because

The correct option is A They are cold blooded

• Lizard being a reptile is a cold-blooded animal.
• Cold-blooded refers to the ability of an organism to change its body temperature with respect to the surrounding.
• During the extremely cold, lizards face the danger of either their blood freezing up or their temperature dropping drastically, as a result of which they become immobile and can easily fall prey to enemies.
• Hence, lizards hibernate in cracks of walls or beneath the soil to conserve energy and to avoid predators.

So, the correct option is A.