the three choices you could use are monotreme, marsupial, and placemental. the real answer is the environment in which it lives!!! HOPE U LEARNED SOMETHING!!
we classify the objects on the basis of certain characteristics favorable for us. we use different characteristics to classify the different types of the objects into groups.
characteristics.
characteristics
classify man
you classify stars by color, temperature, size, composition, and brightness.
size and shape
No
Their foot
their genome
size
Luster and composition are two characteristics used to classify minerals.