Select species of animals enters into the state of animal dormancy to avoid damage from adverse season. Which among the following are included in such animals?
1. Polar Bear
2. Tortoises
3. Crocodiles
4. Salamanders
Select the correct option from the codes given below:

Answer: [D] 1, 2, 3 & 4

Many animals go under the ground during winter. This process is called hibernation. During this period metabolic rate is reduced. In fact, it is a  mechanism of survival. Amphibians like toad and frog undergo hibernation. Hybernation is also seen in female polar bears.  Aestivation is  an opposite process of hibernation. Some animals go under the ground during the dry season of summer. In zoology it is a state of inactivity and reduced metabolic activity that occurs during the dry season in species such as lungfish and snails.

This question is a part of GKToday's Integrated IAS General Studies Module