Animals like snail and fish go into _________ to avoid summer related problem and animal like bear go into _________ to avoid winter related stress.

During the unfavourable conditions of environment, most living organisms suspend their metabolic activities and development to tide over the period of stress. Animals like snails and fish go into aestivation (summer sleep) to avoid heat and desiccation, while bear goes into hibernation (winter sleep) to survive the cold, dark winters and avoid the stress of foraging in extreme cold.