Q: Traditionally, mammals were divided into groups based on what?


Read this paragraph and choose the correct option from the provided answers:

Traditionally, mammals were divided into groups based on their characteristics. Scientists took into consideration their anatomy (body structure), their habitats, and their feeding habits. Mammals are divided into three subclasses and about 26 orders. Some of the groups of mammals include:.

 Choices:

- their sizes

- their colors

- their behaviors

- their characteristics


A:
their characteristics