If researchers must rely on volunteers does this procedure guarantee that he/she is using a representative sample in their research? Why or why not? Is this limitation a serious problem for quantitative researchers? Why or why not?

Texas’ gulf coastal plains are the western extension of the coastal plain extending from the atlantic ocean to beyond the rio grande. its characteristic rolling to hilly surface covered with a heavy growth of pine and hardwoods extends into east texas. in the increasingly arid west, however, its forests become secondary in nature, consisting largely of post oaks and, farther west, prairies and brushlands.