Why frogs and lizards are not seen during winter months?

Why we shiver during winter months?

How the frog and lizards tolerate extreme winter days?

Choose the correct alternative. Amphibians and lizards undego aestivation /hibernation during winter months.

Choose the correct alternative: Period of dormancy in animals during winter months is called aestivation/hibernation.

Sometimes, a crackling sound is heard while taking off sweater during winters. Explain.