Explanation

Halbi, Ho, and Kui are indigenous tribal languages spoken across central and eastern India:

– Halbi: An Eastern Indo-Aryan language spoken predominantly by the Halba tribal community across the Bastar region of Chhattisgarh, Maharashtra, and Odisha, often serving as a regional lingua franca.
– Ho: An Austroasiatic (Munda sub-family) language spoken by the Ho tribal community across Jharkhand, Odisha, and West Bengal, traditionally recorded in its distinct indigenous script called Warang Chiti.
– Kui: A South-Eastern Dravidian language spoken by the Kandha (Khond) tribe inhabiting the hilly forested tracts of southern and central Odisha.

Thus, these terms represent tribal languages — Option D.