In which part of Bangladesh do most indigenous groups live?

(Read the text and answer the question)

The indigenous groups in Bangladesh speak at least 35 distinct languages.

"Language Death" is related to the decline of indigenous languages.

The UN warns that many Indigenous languages are disappearing.

The dominance of Bangla and modern societal pressures have made it difficult for indigenous people to preserve their languages today.

There are more than 54 Indigenous groups in Bangladesh.

In Bangladesh, most of the Indigenous groups live in the northern and southeastern flatlands, with the rest in the Chattogram Hill Tracts.