1)how did the discovery of oil affect the population of texas? a. the population stayed the same. b. the population started to decline. c. the population decreased rapidly. d. the population began to grow quickly. 2)how were the oil and lumber industries in texas related?  a. oil was used to fertilize trees.  b. lumber was used to build drills.  c. lumber was found near oil wells.  d. oil derricks were built from lumber.