Crocodiles have a _____ chambered heart.

four

 The correct answer is Option (2) -four

Crocodiles have a 4-chambered heart. The presence of a four-chambered heart is a characteristic feature shared by mammals and birds, and it allows for a more efficient separation of oxygenated and deoxygenated blood. This adaptation is particularly beneficial for animals with higher metabolic rates and more active lifestyles. Crocodiles are unique among reptiles in having a heart that resembles the four-chambered hearts of birds and mammals.