10. A & D (Karankawas & Coahuiltecans.)
21. D (District and appellate judicial offices in Texas are elected by popular vote, while those of the federal government are appointed by the president and approved by the senate.)
12. D (Mountains of West Texas. Specifically the Trans-Pecos region.)
13. C (Irrigation and other dry farming techniques. Specifically through the drilling of wells to get to underground aquifers.)
11. A (Coastal Plains.)
Good luck!
