fill in the blank

Karwankawas & Jumano both hunted buffalo and other game
Apache and Comanche both camped near canyons and mountains to provide protection from attacks.
Esto’k Gna developed early agriculture along the Rio Grande. Their heritage is disappearing quickly due to________. Since they are not recognized by the U.S. Government they have little support in preserving their cultural sites and artifacts

displacement and assimilation

The blank can be filled in with "lack of recognition and support."

The reason for this is explained in the second part of the sentence: "Since they are not recognized by the U.S. Government they have little support in preserving their cultural sites and artifacts." The Esto’k Gna tribe's heritage is disappearing quickly because they do not have official recognition from the U.S. Government, which means they have limited assistance and resources available to them in preserving their cultural sites and artifacts. Recognition by the government often grants tribes access to funding, legal protections, and preservation programs designed to support and safeguard their cultural heritage. Without such recognition and support, the Esto’k Gna tribe faces challenges in preserving their traditions and history.