Concept:Crocodiles belong to class Reptilia.
Reptiles are identified by their dry, scaly skin and the presence of claws on their digits.
Explanation:In the labelled diagram, the feature labelled III represents the body scales/scutes.
This is a characteristic reptilian feature.
The feature labelled IV represents the clawed toes or digits.
Clawed digits are also diagnostic of class Reptilia.
The nostril, eye, and tail labelled in the diagram are not exclusive to reptiles.
They also appear in other vertebrate classes.
Therefore, the two labels that correctly show reptilian class features are III and IV.
Answer:B. III and IV
