The correct options are
B Tribal people do not have the notion of private property in land.
C When population increases and new families are formed, the village elders give them permission to clear new plots of land.
The tribals treated the forest as their own and lived without changing the environment too much. They observed podu cultivation and hence did not have the concept of private lands and every member used the space. As population increased, new lands were cleared using the permission of the elders.