The correct option is 1: Heterodont, Thecodont, Diphyodont This option accurately describes the three fundamental and defining characteristics of mammalian dentition, which is a major evolutionary adaptation distinguishing them from most other vertebrates. Heterodont refers to the presence of teeth that are differentiated in shape, structure, and function—specifically, incisors for cutting, canines for tearing, premolars for crushing, and molars for grinding. This specialization allows mammals to process a wide variety…Read More