Explanation: Proto-Australoids: It is believed that the proto-Australoid elements are widespread in Indian population.

• The Proto-Australoids are said to have come from the West and exhibit features such as wavy hair, prominent eye ridges, sunken nose, thick jaw, low forehead, and small chins.
• Some proto-Australoid racial features have been noted from the skeletal remains found from Mohenjodaro.
• It shows that Proto-Australoids might have laid the foundation of Indian culture.
• The tribal groups of Central India, like Munda, Ho, Oraon, Santhals, Gond and Khond and the Kurichya tribe of Kerala represent this racial stock.

Source: Kerala NCERT