Which species became increasingly specialized to foods requiring heavy chewing?

Name: Which species became increasingly specialized to foods requiring heavy chewing?
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Australopithecus species, particularly A. robustus and A. boisei, had large molars and jaw muscles adapted to a diet of tough and fibrous plant material, indicating they were increasingly specialized to foods requiring heavy chewing. The other three species mentioned did not have as significant adaptations to these types of foods.

Which Species Became Increasingly Specialized to Foods Requiring Heavy Chewing