If you would like to know the answer to that question it would be hard to do but if you go to a very reliable sores called google you might get the answer
Answer: Okay, so I am doing this question right now and I'm looking in the book (for me it's page 360 in the Texas History book) and here is what it says:
Explanation: More settlers meant a greater need for lumber to build homes and stores. As a result, sawmills were built in new communities to meet that need.
so the answer would be sawmills (cause it says that sawmills were built to meet that need.)