Question

based on the picture, which class does the platypus belong in?
monotremata
animalia
chordata
mammalia

Explanation:

The platypus is a mammal. From the taxonomic hierarchy in the image, after Chordata and Animalia, the platypus falls under Mammalia (it is a monotreme, a type of mammal). Among the options, Mammalia is the class (the other options like Monotremata is an order, Chordata is a phylum, Animalia is a kingdom; the question asks for the class, and Mammalia is the class for the platypus).

Answer:

Mammalia