Solution:
Concept: Frogs must have certain adaptations in order to live both on land and in water. They are cold-blooded or poikilotherms, which means that the temperature of their bodies varies with the surroundings.A frog can breathe through both its skin and lungs. They have webbed feet, which make it easier for them to swim. The long, strong hind limbs are used for leaping and grabbing prey. A frog's eyes and nose are located on top of its head, allowing it to see and breathe while most of its body is submerged in water.
Hence, option 4 is the correct answer.
