Final answer:
Texas missionaries built their missions from natural resources in the area, using adobe in West Texas and timber in East Texas.
Step-by-step explanation:
The statement is true.
Texas missionaries did indeed build their missions from natural resources in the area. In West Texas, adobe was commonly used as it was a readily available material consisting of sun-dried bricks made from clay, sand, water, and sometimes other organic materials. In East Texas, timber was used as it was abundant in the region.