Option 2. Fish and amphibians, or mammals adapted to aquatic life, would have the highest chance of survival if they fell into water due to their adaptations for aquatic living. While birds and reptiles can also swim, their ability to survive in water depends largely on the species and situation. ;
Among the animal groups considered, Fish and Amphibians have the highest chances of survival in water due to their adaptations for aquatic living. Fish are inherently aquatic, while amphibians have lifecycle and physiological features that allow them to live in water as well. Therefore, the best answer is option B: Fish and amphibian.
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