Directions: Select the most appropriate word from the options and fill in the blank.

Few tribes are _____ to this wilderness of rocks and parched earth.

The sentence discusses tribes and their relationship to a harsh wilderness environment. Option B 'indigenous' is correct because it means native or inherent to a particular place or region - tribes that are originally from and belong to that wilderness. The other options are incorrect: indigent means poor, indicative means serving as a sign, and indolent means lazy.