Explanation

The frog is a cold-blooded animal, i.e., its body temperature changes with the temperature of the surrounding environment (Poikilothermic). In winters the body temperature of frog falls considerably. This make it inactive and may result in death. To avoid this, during this period it does not show any movement and respires through the skin. In hot summers, also it burries itself in the mud at the bottom of pond and respire through skin. When water recollects in the pond the frog again becomes active. The winter activity is called hibernation while summer activity is called estivaion