Tribals of Odisha fear their displacement due to the extraction of which mineral?

Iron Ore

The correct answer is Option 3 - Iron Ore

Orissa is rich in Iron ore. The tribal population of Orissa fears that the setting up of industries would mean displacement from their home and livelihood.

The iron ore resources lay in some of the most underdeveloped and predominantly tribal districts of the state. Different people had different concerns regarding the setting up of Industry in the region:
The tribal population feared that the setting up of industries would mean displacement from their home and livelihood.
The environmentalists feared that mining and industry would pollute the environment.
The central government felt that if the industry was not allowed it would set a bad example and discourage investments in the country.